137942865 has 16 divisors (see below), whose sum is σ = 245232000. Its totient is φ = 73569456.

The previous prime is 137942863. The next prime is 137942873. The reversal of 137942865 is 568249731.

It is not a de Polignac number, because 137942865 - 2¹ = 137942863 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 137942865.

It is not an unprimeable number, because it can be changed into a prime (137942863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510765 + ... + 511034.

It is an arithmetic number, because the mean of its divisors is an integer number (15327000).

Almost surely, 2^137942865 is an apocalyptic number.

137942865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

137942865 is a deficient number, since it is larger than the sum of its proper divisors (107289135).

137942865 is a wasteful number, since it uses less digits than its factorization.

137942865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021813 (or 1021807 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 137942865 is about 11744.9080456170. The cubic root of 137942865 is about 516.6935980874.

It can be divided in two parts, 1379 and 42865, that added together give a palindrome (44244).

The spelling of 137942865 in words is "one hundred thirty-seven million, nine hundred forty-two thousand, eight hundred sixty-five".