12512565 has 48 divisors (see below), whose sum is σ = 23757552. Its totient is φ = 6054912.

The previous prime is 12512557. The next prime is 12512569. The reversal of 12512565 is 56521521.

It can be written as a sum of positive squares in 8 ways, for example, as 23409 + 12489156 = 153^2 + 3534^2 .

It is not a de Polignac number, because 12512565 - 2³ = 12512557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12512569) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42559 + ... + 42851.

It is an arithmetic number, because the mean of its divisors is an integer number (494949).

Almost surely, 2^12512565 is an apocalyptic number.

12512565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12512565 is a deficient number, since it is larger than the sum of its proper divisors (11244987).

12512565 is a wasteful number, since it uses less digits than its factorization.

12512565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 387 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 12512565 is about 3537.3104189483. The cubic root of 12512565 is about 232.1571777246.

The spelling of 12512565 in words is "twelve million, five hundred twelve thousand, five hundred sixty-five".