137681256 has 32 divisors (see below), whose sum is σ = 344512800. Its totient is φ = 45852480.

The previous prime is 137681221. The next prime is 137681263. The reversal of 137681256 is 652186731.

It is a super-2 number, since 2×137681256² = 37912256507475072, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 37135 + ... + 40673.

It is an arithmetic number, because the mean of its divisors is an integer number (10766025).

Almost surely, 2^137681256 is an apocalyptic number.

It is an amenable number.

137681256 is an abundant number, since it is smaller than the sum of its proper divisors (206831544).

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

137681256 is a wasteful number, since it uses less digits than its factorization.

137681256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5169 (or 5165 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 137681256 is about 11733.7656359755. The cubic root of 137681256 is about 516.3667544656.

The spelling of 137681256 in words is "one hundred thirty-seven million, six hundred eighty-one thousand, two hundred fifty-six".