11157972 has 24 divisors (see below), whose sum is σ = 29754816. Its totient is φ = 3187968.

The previous prime is 11157961. The next prime is 11157983. The reversal of 11157972 is 27975111.

It is an interprime number because it is at equal distance from previous prime (11157961) and next prime (11157983).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66333 + ... + 66500.

It is an arithmetic number, because the mean of its divisors is an integer number (1239784).

Almost surely, 2^11157972 is an apocalyptic number.

11157972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11157972 is an abundant number, since it is smaller than the sum of its proper divisors (18596844).

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

11157972 is a wasteful number, since it uses less digits than its factorization.

11157972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132847 (or 132845 counting only the distinct ones).

The product of its digits is 4410, while the sum is 33.

The square root of 11157972 is about 3340.3550709468. The cubic root of 11157972 is about 223.4575789444.

The spelling of 11157972 in words is "eleven million, one hundred fifty-seven thousand, nine hundred seventy-two".