397261271 has 6 divisors (see below), whose sum is σ = 436659216. Its totient is φ = 361146500.

The previous prime is 397261261. The next prime is 397261273. The reversal of 397261271 is 172162793.

It is a de Polignac number, because none of the positive numbers 2^k-397261271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397261273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1641455 + ... + 1641696.

It is an arithmetic number, because the mean of its divisors is an integer number (72776536).

Almost surely, 2^397261271 is an apocalyptic number.

397261271 is a deficient number, since it is larger than the sum of its proper divisors (39397945).

397261271 is a wasteful number, since it uses less digits than its factorization.

397261271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283173 (or 3283162 counting only the distinct ones).

The product of its digits is 31752, while the sum is 38.

The square root of 397261271 is about 19931.4141746139. The cubic root of 397261271 is about 735.1208532205.

The spelling of 397261271 in words is "three hundred ninety-seven million, two hundred sixty-one thousand, two hundred seventy-one".