1157992 has 16 divisors (see below), whose sum is σ = 2368800. Its totient is φ = 526320.

The previous prime is 1157987. The next prime is 1158007. The reversal of 1157992 is 2997511.

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, 6492 + ... + 6667.

It is an arithmetic number, because the mean of its divisors is an integer number (148050).

2^1157992 is an apocalyptic number.

It is an amenable number.

1157992 is an abundant number, since it is smaller than the sum of its proper divisors (1210808).

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

1157992 is a wasteful number, since it uses less digits than its factorization.

1157992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13176 (or 13172 counting only the distinct ones).

The product of its digits is 5670, while the sum is 34.

The square root of 1157992 is about 1076.1003670662. The cubic root of 1157992 is about 105.0110948216.

The spelling of 1157992 in words is "one million, one hundred fifty-seven thousand, nine hundred ninety-two".