137274521 has 4 divisors (see below), whose sum is σ = 137344272. Its totient is φ = 137204772.

The previous prime is 137274509. The next prime is 137274523. The reversal of 137274521 is 125472731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 137274521 - 2²⁶ = 70165657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137274523) 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, 31835 + ... + 35888.

It is an arithmetic number, because the mean of its divisors is an integer number (34336068).

Almost surely, 2^137274521 is an apocalyptic number.

It is an amenable number.

137274521 is a deficient number, since it is larger than the sum of its proper divisors (69751).

137274521 is an equidigital number, since it uses as much as digits as its factorization.

137274521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69750.

The product of its digits is 11760, while the sum is 32.

The square root of 137274521 is about 11716.4209978986. The cubic root of 137274521 is about 515.8577730820.

The spelling of 137274521 in words is "one hundred thirty-seven million, two hundred seventy-four thousand, five hundred twenty-one".