123649265 has 16 divisors (see below), whose sum is σ = 157759488. Its totient is φ = 92828736.

The previous prime is 123649249. The next prime is 123649277. The reversal of 123649265 is 562946321.

It is not a de Polignac number, because 123649265 - 2⁴ = 123649249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4049 + ... + 16238.

It is an arithmetic number, because the mean of its divisors is an integer number (9859968).

Almost surely, 2^123649265 is an apocalyptic number.

It is an amenable number.

123649265 is a deficient number, since it is larger than the sum of its proper divisors (34110223).

123649265 is a wasteful number, since it uses less digits than its factorization.

123649265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20368.

The product of its digits is 77760, while the sum is 38.

The square root of 123649265 is about 11119.7691073151. The cubic root of 123649265 is about 498.1924937158.

The spelling of 123649265 in words is "one hundred twenty-three million, six hundred forty-nine thousand, two hundred sixty-five".