123231265 has 4 divisors (see below), whose sum is σ = 147877524. Its totient is φ = 98585008.

The previous prime is 123231259. The next prime is 123231271. The reversal of 123231265 is 562132321.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (123231259) and next prime (123231271).

It can be written as a sum of positive squares in 2 ways, for example, as 96118416 + 27112849 = 9804^2 + 5207^2 .

It is a cyclic number.

It is not a de Polignac number, because 123231265 - 2³ = 123231257 is a prime.

It is a Duffinian 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, 12323122 + ... + 12323131.

It is an arithmetic number, because the mean of its divisors is an integer number (36969381).

Almost surely, 2^123231265 is an apocalyptic number.

It is an amenable number.

123231265 is a deficient number, since it is larger than the sum of its proper divisors (24646259).

123231265 is an equidigital number, since it uses as much as digits as its factorization.

123231265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24646258.

The product of its digits is 2160, while the sum is 25.

The square root of 123231265 is about 11100.9578415558. The cubic root of 123231265 is about 497.6304751090.

Adding to 123231265 its reverse (562132321), we get a palindrome (685363586).

The spelling of 123231265 in words is "one hundred twenty-three million, two hundred thirty-one thousand, two hundred sixty-five".