397131142 has 16 divisors (see below), whose sum is σ = 620669952. Its totient is φ = 190361160.

The previous prime is 397131121. The next prime is 397131143. The reversal of 397131142 is 241131793.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397131143) 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, 23298 + ... + 36565.

It is an arithmetic number, because the mean of its divisors is an integer number (38791872).

Almost surely, 2^397131142 is an apocalyptic number.

397131142 is a deficient number, since it is larger than the sum of its proper divisors (223538810).

397131142 is a wasteful number, since it uses less digits than its factorization.

397131142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60003.

The product of its digits is 4536, while the sum is 31.

The square root of 397131142 is about 19928.1494875967. The cubic root of 397131142 is about 735.0405777650.

The spelling of 397131142 in words is "three hundred ninety-seven million, one hundred thirty-one thousand, one hundred forty-two".