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111020 = 22571361
BaseRepresentation
bin11011000110101100
312122021212
4123012230
512023040
62213552
7641450
oct330654
9178255
10111020
1176458
12542b8
133b6c0
142c660
1522d65
hex1b1ac

111020 has 48 divisors (see below), whose sum is σ = 291648. Its totient is φ = 34560.

The previous prime is 110989. The next prime is 111029. The reversal of 111020 is 20111.

Adding to 111020 its reverse (20111), we get a palindrome (131131).

Subtracting from 111020 its reverse (20111), we obtain a palindrome (90909).

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a junction number, because it is equal to n+sod(n) for n = 110995 and 111013.

It is not an unprimeable number, because it can be changed into a prime (111029) by changing a digit.

111020 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1790 + ... + 1850.

It is an arithmetic number, because the mean of its divisors is an integer number (6076).

2111020 is an apocalyptic number.

111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145824).

111020 is an abundant number, since it is smaller than the sum of its proper divisors (180628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111020 is a wasteful number, since it uses less digits than its factorization.

111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 111020 is about 333.1966386385. The cubic root of 111020 is about 48.0618415875.

The spelling of 111020 in words is "one hundred eleven thousand, twenty", and thus it is an iban number.

Divisors: 1 2 4 5 7 10 13 14 20 26 28 35 52 61 65 70 91 122 130 140 182 244 260 305 364 427 455 610 793 854 910 1220 1586 1708 1820 2135 3172 3965 4270 5551 7930 8540 11102 15860 22204 27755 55510 111020