137870865 has 48 divisors (see below), whose sum is σ = 262080000. Its totient is φ = 66493440.

The previous prime is 137870849. The next prime is 137870869. The reversal of 137870865 is 568078731.

137870865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 137870865 - 2⁴ = 137870849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 137870865.

It is not an unprimeable number, because it can be changed into a prime (137870869) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109761 + ... + 111009.

It is an arithmetic number, because the mean of its divisors is an integer number (5460000).

Almost surely, 2^137870865 is an apocalyptic number.

137870865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

137870865 is a deficient number, since it is larger than the sum of its proper divisors (124209135).

137870865 is a wasteful number, since it uses less digits than its factorization.

137870865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494 (or 1491 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 137870865 is about 11741.8424874463. The cubic root of 137870865 is about 516.6036854667.

The spelling of 137870865 in words is "one hundred thirty-seven million, eight hundred seventy thousand, eight hundred sixty-five".