123538565 has 16 divisors (see below), whose sum is σ = 153501696. Its totient is φ = 95347200.

The previous prime is 123538561. The next prime is 123538573. The reversal of 123538565 is 565835321.

It is not a de Polignac number, because 123538565 - 2² = 123538561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123538561) 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, 58325 + ... + 60405.

It is an arithmetic number, because the mean of its divisors is an integer number (9593856).

Almost surely, 2^123538565 is an apocalyptic number.

It is an amenable number.

123538565 is a deficient number, since it is larger than the sum of its proper divisors (29963131).

123538565 is a wasteful number, since it uses less digits than its factorization.

123538565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500.

The product of its digits is 108000, while the sum is 38.

The square root of 123538565 is about 11114.7903713925. The cubic root of 123538565 is about 498.0437763596.

The spelling of 123538565 in words is "one hundred twenty-three million, five hundred thirty-eight thousand, five hundred sixty-five".