137972642 has 8 divisors (see below), whose sum is σ = 217851600. Its totient is φ = 65355444.

The previous prime is 137972641. The next prime is 137972647. The reversal of 137972642 is 246279731.

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

It is a self number, because there is not a number n which added to its sum of digits gives 137972642.

It is not an unprimeable number, because it can be changed into a prime (137972641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1815392 + ... + 1815467.

It is an arithmetic number, because the mean of its divisors is an integer number (27231450).

Almost surely, 2^137972642 is an apocalyptic number.

137972642 is a deficient number, since it is larger than the sum of its proper divisors (79878958).

137972642 is a wasteful number, since it uses less digits than its factorization.

137972642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630880.

The product of its digits is 127008, while the sum is 41.

The square root of 137972642 is about 11746.1756329454. The cubic root of 137972642 is about 516.7307740548.

The spelling of 137972642 in words is "one hundred thirty-seven million, nine hundred seventy-two thousand, six hundred forty-two".