397252761 has 8 divisors (see below), whose sum is σ = 529823424. Its totient is φ = 264758640.

The previous prime is 397252747. The next prime is 397252777. The reversal of 397252761 is 167252793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 397252761 - 2⁶ = 397252697 is a prime.

It is a super-2 number, since 2×397252761² = 315619512244246242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (397252721) 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, 5670 + ... + 28751.

It is an arithmetic number, because the mean of its divisors is an integer number (66227928).

Almost surely, 2^397252761 is an apocalyptic number.

It is an amenable number.

397252761 is a deficient number, since it is larger than the sum of its proper divisors (132570663).

397252761 is a wasteful number, since it uses less digits than its factorization.

397252761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38271.

The product of its digits is 158760, while the sum is 42.

The square root of 397252761 is about 19931.2006913783. The cubic root of 397252761 is about 735.1156040108.

It can be divided in two parts, 39725 and 2761, that added together give a triangular number (42486 = T₂₉₁).

The spelling of 397252761 in words is "three hundred ninety-seven million, two hundred fifty-two thousand, seven hundred sixty-one".