137521704 has 128 divisors (see below), whose sum is σ = 383201280. Its totient is φ = 40934400.

The previous prime is 137521691. The next prime is 137521733. The reversal of 137521704 is 407125731.

137521704 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1049719 + ... + 1049849.

It is an arithmetic number, because the mean of its divisors is an integer number (2993760).

Almost surely, 2^137521704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 137521704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191600640).

137521704 is an abundant number, since it is smaller than the sum of its proper divisors (245679576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

137521704 is a wasteful number, since it uses less digits than its factorization.

137521704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 137521704 is about 11726.9648247106. The cubic root of 137521704 is about 516.1672133996.

The spelling of 137521704 in words is "one hundred thirty-seven million, five hundred twenty-one thousand, seven hundred four".