137612421 has 12 divisors (see below), whose sum is σ = 209235520. Its totient is φ = 86913000.

The previous prime is 137612369. The next prime is 137612521. The reversal of 137612421 is 124216731.

137612421 is a `hidden beast` number, since 1 + 3 + 7 + 612 + 42 + 1 = 666.

It is not a de Polignac number, because 137612421 - 2⁹ = 137611909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137612521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 402205 + ... + 402546.

Almost surely, 2^137612421 is an apocalyptic number.

It is an amenable number.

137612421 is a deficient number, since it is larger than the sum of its proper divisors (71623099).

137612421 is a wasteful number, since it uses less digits than its factorization.

137612421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804776 (or 804773 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 137612421 is about 11730.8320676753. The cubic root of 137612421 is about 516.2806860306.

The spelling of 137612421 in words is "one hundred thirty-seven million, six hundred twelve thousand, four hundred twenty-one".