1139220 has 36 divisors (see below), whose sum is σ = 3456180. Its totient is φ = 303744.

The previous prime is 1139197. The next prime is 1139227. The reversal of 1139220 is 229311.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 646416 + 492804 = 804^2 + 702^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1139193 and 1139202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2985 + ... + 3344.

It is an arithmetic number, because the mean of its divisors is an integer number (96005).

2^1139220 is an apocalyptic number.

1139220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1139220 is an abundant number, since it is smaller than the sum of its proper divisors (2316960).

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

1139220 is a wasteful number, since it uses less digits than its factorization.

1139220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6344 (or 6339 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1139220 is about 1067.3424942351. The cubic root of 1139220 is about 104.4405620340.

Subtracting from 1139220 its reverse (229311), we obtain a palindrome (909909).

The spelling of 1139220 in words is "one million, one hundred thirty-nine thousand, two hundred twenty".