12565903 has 24 divisors (see below), whose sum is σ = 15595200. Its totient is φ = 10075968.

The previous prime is 12565871. The next prime is 12565919. The reversal of 12565903 is 30956521.

It is not a de Polignac number, because 12565903 - 2⁵ = 12565871 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 (12565603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52458 + ... + 52696.

It is an arithmetic number, because the mean of its divisors is an integer number (649800).

Almost surely, 2^12565903 is an apocalyptic number.

12565903 is a deficient number, since it is larger than the sum of its proper divisors (3029297).

12565903 is a wasteful number, since it uses less digits than its factorization.

12565903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 12565903 is about 3544.8417454098. The cubic root of 12565903 is about 232.4865865002.

The spelling of 12565903 in words is "twelve million, five hundred sixty-five thousand, nine hundred three".