137521012 has 12 divisors (see below), whose sum is σ = 253328320. Its totient is φ = 65141496.

The previous prime is 137520989. The next prime is 137521019. The reversal of 137521012 is 210125731.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137521019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 904668 + ... + 904819.

Almost surely, 2^137521012 is an apocalyptic number.

It is an amenable number.

137521012 is a deficient number, since it is larger than the sum of its proper divisors (115807308).

137521012 is a wasteful number, since it uses less digits than its factorization.

137521012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809510 (or 1809508 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 137521012 is about 11726.9353200229. The cubic root of 137521012 is about 516.1663476252.

Adding to 137521012 its reverse (210125731), we get a palindrome (347646743).

The spelling of 137521012 in words is "one hundred thirty-seven million, five hundred twenty-one thousand, twelve".