137244521 has 4 divisors (see below), whose sum is σ = 137471232. Its totient is φ = 137017812.

The previous prime is 137244493. The next prime is 137244539. The reversal of 137244521 is 125442731.

137244521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 137244521 - 2¹⁴ = 137228137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137244221) 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, 112445 + ... + 113658.

It is an arithmetic number, because the mean of its divisors is an integer number (34367808).

Almost surely, 2^137244521 is an apocalyptic number.

It is an amenable number.

137244521 is a deficient number, since it is larger than the sum of its proper divisors (226711).

137244521 is an equidigital number, since it uses as much as digits as its factorization.

137244521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226710.

The product of its digits is 6720, while the sum is 29.

The square root of 137244521 is about 11715.1406735045. The cubic root of 137244521 is about 515.8201917922.

The spelling of 137244521 in words is "one hundred thirty-seven million, two hundred forty-four thousand, five hundred twenty-one".