397217042 has 16 divisors (see below), whose sum is σ = 602619264. Its totient is φ = 196350000.

The previous prime is 397217039. The next prime is 397217111. The reversal of 397217042 is 240712793.

It is a junction number, because it is equal to n+sod(n) for n = 397216993 and 397217011.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211367 + ... + 213237.

It is an arithmetic number, because the mean of its divisors is an integer number (37663704).

Almost surely, 2^397217042 is an apocalyptic number.

397217042 is a deficient number, since it is larger than the sum of its proper divisors (205402222).

397217042 is a wasteful number, since it uses less digits than its factorization.

397217042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 397217042 is about 19930.3046138287. The cubic root of 397217042 is about 735.0935706995.

The spelling of 397217042 in words is "three hundred ninety-seven million, two hundred seventeen thousand, forty-two".