1157697 has 12 divisors (see below), whose sum is σ = 1681680. Its totient is φ = 767448.

The previous prime is 1157671. The next prime is 1157699. The reversal of 1157697 is 7967511.

It is not a de Polignac number, because 1157697 - 2¹⁸ = 895553 is a prime.

It is an Ulam number.

1157697 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1157699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2554 + ... + 2972.

It is an arithmetic number, because the mean of its divisors is an integer number (140140).

2^1157697 is an apocalyptic number.

It is an amenable number.

1157697 is a deficient number, since it is larger than the sum of its proper divisors (523983).

1157697 is a wasteful number, since it uses less digits than its factorization.

1157697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732 (or 729 counting only the distinct ones).

The product of its digits is 13230, while the sum is 36.

The square root of 1157697 is about 1075.9632893366. The cubic root of 1157697 is about 105.0021768256.

The spelling of 1157697 in words is "one million, one hundred fifty-seven thousand, six hundred ninety-seven".