137122565 has 4 divisors (see below), whose sum is σ = 164547084. Its totient is φ = 109698048.

The previous prime is 137122537. The next prime is 137122589. The reversal of 137122565 is 565221731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565221731 = 37 ⋅15276263.

It can be written as a sum of positive squares in 2 ways, for example, as 54257956 + 82864609 = 7366^2 + 9103^2 .

It is a cyclic number.

It is not a de Polignac number, because 137122565 - 2²⁰ = 136073989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13712252 + ... + 13712261.

It is an arithmetic number, because the mean of its divisors is an integer number (41136771).

Almost surely, 2^137122565 is an apocalyptic number.

It is an amenable number.

137122565 is a deficient number, since it is larger than the sum of its proper divisors (27424519).

137122565 is an equidigital number, since it uses as much as digits as its factorization.

137122565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27424518.

The product of its digits is 12600, while the sum is 32.

The square root of 137122565 is about 11709.9344575450. The cubic root of 137122565 is about 515.6673599237.

The spelling of 137122565 in words is "one hundred thirty-seven million, one hundred twenty-two thousand, five hundred sixty-five".