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122020 = 2256101
BaseRepresentation
bin11101110010100100
320012101021
4131302210
512401040
62340524
71015513
oct356244
9205337
10122020
1183748
125a744
1343702
143267a
152624a
hex1dca4

122020 has 12 divisors (see below), whose sum is σ = 256284. Its totient is φ = 48800.

The previous prime is 122011. The next prime is 122021. The reversal of 122020 is 20221.

122020 = T245 + T246 + ... + T248.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 60516 + 61504 = 246^2 + 248^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121994 and 122012.

It is not an unprimeable number, because it can be changed into a prime (122021) by changing a digit.

122020 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 3 ways as a sum of consecutive naturals, for example, 3031 + ... + 3070.

It is an arithmetic number, because the mean of its divisors is an integer number (21357).

2122020 is an apocalyptic number.

122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122020 is an abundant number, since it is smaller than the sum of its proper divisors (134264).

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

122020 is a wasteful number, since it uses less digits than its factorization.

122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6110 (or 6108 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 122020 is about 349.3136126749. The cubic root of 122020 is about 49.5994666956.

Adding to 122020 its reverse (20221), we get a palindrome (142241).

The spelling of 122020 in words is "one hundred twenty-two thousand, twenty", and thus it is an iban number.

Divisors: 1 2 4 5 10 20 6101 12202 24404 30505 61010 122020