397551 has 16 divisors (see below), whose sum is σ = 661248. Its totient is φ = 206400.

The previous prime is 397549. The next prime is 397567. The reversal of 397551 is 155793.

It is a happy number.

It is not a de Polignac number, because 397551 - 2¹ = 397549 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 397551.

It is not an unprimeable number, because it can be changed into a prime (397541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 630 + ... + 1091.

It is an arithmetic number, because the mean of its divisors is an integer number (41328).

2³⁹⁷⁵⁵¹ is an apocalyptic number.

397551 is a deficient number, since it is larger than the sum of its proper divisors (263697).

397551 is a wasteful number, since it uses less digits than its factorization.

397551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742.

The product of its digits is 4725, while the sum is 30.

The square root of 397551 is about 630.5164549796. The cubic root of 397551 is about 73.5299521592.

The spelling of 397551 in words is "three hundred ninety-seven thousand, five hundred fifty-one".