12565493 has 2 divisors, whose sum is σ = 12565494. Its totient is φ = 12565492.

The previous prime is 12565489. The next prime is 12565513. The reversal of 12565493 is 39456521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11142244 + 1423249 = 3338^2 + 1193^2 .

It is a cyclic number.

It is not a de Polignac number, because 12565493 - 2² = 12565489 is a prime.

It is a super-2 number, since 2×12565493² = 315783228666098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12565433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6282746 + 6282747.

It is an arithmetic number, because the mean of its divisors is an integer number (6282747).

Almost surely, 2^12565493 is an apocalyptic number.

It is an amenable number.

12565493 is a deficient number, since it is larger than the sum of its proper divisors (1).

12565493 is an equidigital number, since it uses as much as digits as its factorization.

12565493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 35.

The square root of 12565493 is about 3544.7839144298. The cubic root of 12565493 is about 232.4840579503.

The spelling of 12565493 in words is "twelve million, five hundred sixty-five thousand, four hundred ninety-three".