397156 has 6 divisors (see below), whose sum is σ = 695030. Its totient is φ = 198576.

The previous prime is 397153. The next prime is 397181. The reversal of 397156 is 651793.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 256 = 630^2 + 16^2 .

It is not an unprimeable number, because it can be changed into a prime (397151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49641 + ... + 49648.

2³⁹⁷¹⁵⁶ is an apocalyptic number.

It is an amenable number.

397156 is a deficient number, since it is larger than the sum of its proper divisors (297874).

397156 is a wasteful number, since it uses less digits than its factorization.

397156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99293 (or 99291 counting only the distinct ones).

The product of its digits is 5670, while the sum is 31.

The square root of 397156 is about 630.2031418519. The cubic root of 397156 is about 73.5055913805.

The spelling of 397156 in words is "three hundred ninety-seven thousand, one hundred fifty-six".