1115720 has 16 divisors (see below), whose sum is σ = 2510460. Its totient is φ = 446272.

The previous prime is 1115713. The next prime is 1115731. The reversal of 1115720 is 275111.

It can be written as a sum of positive squares in 2 ways, for example, as 1012036 + 103684 = 1006^2 + 322^2 .

It is a super-2 number, since 2×1115720² = 2489662236800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13907 + ... + 13986.

2^1115720 is an apocalyptic number.

1115720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1115720 is an abundant number, since it is smaller than the sum of its proper divisors (1394740).

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

1115720 is a wasteful number, since it uses less digits than its factorization.

1115720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27904 (or 27900 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 1115720 is about 1056.2764789580. The cubic root of 1115720 is about 103.7174282037.

The spelling of 1115720 in words is "one million, one hundred fifteen thousand, seven hundred twenty".