131397442 has 8 divisors (see below), whose sum is σ = 215014032. Its totient is φ = 59726100.

The previous prime is 131397439. The next prime is 131397457. The reversal of 131397442 is 244793131.

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

It is a junction number, because it is equal to n+sod(n) for n = 131397398 and 131397407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2986284 + ... + 2986327.

It is an arithmetic number, because the mean of its divisors is an integer number (26876754).

Almost surely, 2^131397442 is an apocalyptic number.

131397442 is a deficient number, since it is larger than the sum of its proper divisors (83616590).

131397442 is a wasteful number, since it uses less digits than its factorization.

131397442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5972624.

The product of its digits is 18144, while the sum is 34.

The square root of 131397442 is about 11462.8723276498. The cubic root of 131397442 is about 508.3884049863.

The spelling of 131397442 in words is "one hundred thirty-one million, three hundred ninety-seven thousand, four hundred forty-two".