137281506 has 16 divisors (see below), whose sum is σ = 274806048. Its totient is φ = 45720000.

The previous prime is 137281483. The next prime is 137281519. The reversal of 137281506 is 605182731.

137281506 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 7 ways as a sum of consecutive naturals, for example, 2320 + ... + 16731.

It is an arithmetic number, because the mean of its divisors is an integer number (17175378).

Almost surely, 2^137281506 is an apocalyptic number.

137281506 is an abundant number, since it is smaller than the sum of its proper divisors (137524542).

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

137281506 is a wasteful number, since it uses less digits than its factorization.

137281506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20257.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 137281506 is about 11716.7190800155. The cubic root of 137281506 is about 515.8665224731.

The spelling of 137281506 in words is "one hundred thirty-seven million, two hundred eighty-one thousand, five hundred six".