397274842 has 4 divisors (see below), whose sum is σ = 595912266. Its totient is φ = 198637420.

The previous prime is 397274777. The next prime is 397274863. The reversal of 397274842 is 248472793.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 344436481 + 52838361 = 18559^2 + 7269^2 .

It is a super-2 number, since 2×397274842² = 315654600172249928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 397274792 and 397274801.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99318709 + ... + 99318712.

Almost surely, 2^397274842 is an apocalyptic number.

397274842 is a deficient number, since it is larger than the sum of its proper divisors (198637424).

397274842 is a wasteful number, since it uses less digits than its factorization.

397274842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198637423.

The product of its digits is 677376, while the sum is 46.

The square root of 397274842 is about 19931.7546141829. The cubic root of 397274842 is about 735.1292240436.

The spelling of 397274842 in words is "three hundred ninety-seven million, two hundred seventy-four thousand, eight hundred forty-two".