397251 has 8 divisors (see below), whose sum is σ = 588560. Its totient is φ = 264816.

The previous prime is 397237. The next prime is 397253. The reversal of 397251 is 152793.

It is not a de Polignac number, because 397251 - 2¹⁴ = 380867 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 14713 = 397251 / (3 + 9 + 7 + 2 + 5 + 1).

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (397253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7330 + ... + 7383.

It is an arithmetic number, because the mean of its divisors is an integer number (73570).

2³⁹⁷²⁵¹ is an apocalyptic number.

397251 is a deficient number, since it is larger than the sum of its proper divisors (191309).

397251 is a wasteful number, since it uses less digits than its factorization.

397251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14722 (or 14716 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 397251 is about 630.2785098669. The cubic root of 397251 is about 73.5114517767.

The spelling of 397251 in words is "three hundred ninety-seven thousand, two hundred fifty-one".