137230521 has 32 divisors (see below), whose sum is σ = 204288000. Its totient is φ = 81570240.

The previous prime is 137230517. The next prime is 137230573. The reversal of 137230521 is 125032731.

It is not a de Polignac number, because 137230521 - 2² = 137230517 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 137230491 and 137230500.

It is not an unprimeable number, because it can be changed into a prime (137230591) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64330 + ... + 66428.

It is an arithmetic number, because the mean of its divisors is an integer number (6384000).

Almost surely, 2^137230521 is an apocalyptic number.

It is an amenable number.

137230521 is a deficient number, since it is larger than the sum of its proper divisors (67057479).

137230521 is a wasteful number, since it uses less digits than its factorization.

137230521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 137230521 is about 11714.5431408997. The cubic root of 137230521 is about 515.8026519827.

The spelling of 137230521 in words is "one hundred thirty-seven million, two hundred thirty thousand, five hundred twenty-one".