137721075 has 24 divisors (see below), whose sum is σ = 229965936. Its totient is φ = 72720000.

The previous prime is 137721053. The next prime is 137721151. The reversal of 137721075 is 570127731.

It is not a de Polignac number, because 137721075 - 2¹¹ = 137719027 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1516 + ... + 16665.

It is an arithmetic number, because the mean of its divisors is an integer number (9581914).

Almost surely, 2^137721075 is an apocalyptic number.

137721075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

137721075 is a deficient number, since it is larger than the sum of its proper divisors (92244861).

137721075 is a wasteful number, since it uses less digits than its factorization.

137721075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18295 (or 18290 counting only the distinct ones).

The product of its (nonzero) digits is 10290, while the sum is 33.

The square root of 137721075 is about 11735.4622831825. The cubic root of 137721075 is about 516.4165293987.

The spelling of 137721075 in words is "one hundred thirty-seven million, seven hundred twenty-one thousand, seventy-five".