12565534 has 4 divisors (see below), whose sum is σ = 18848304. Its totient is φ = 6282766.

The previous prime is 12565519. The next prime is 12565537. The reversal of 12565534 is 43556521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43556521 = 29 ⋅1501949.

It is a junction number, because it is equal to n+sod(n) for n = 12565496 and 12565505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12565537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3141382 + ... + 3141385.

It is an arithmetic number, because the mean of its divisors is an integer number (4712076).

Almost surely, 2^12565534 is an apocalyptic number.

12565534 is a deficient number, since it is larger than the sum of its proper divisors (6282770).

12565534 is an equidigital number, since it uses as much as digits as its factorization.

12565534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6282769.

The product of its digits is 18000, while the sum is 31.

The square root of 12565534 is about 3544.7896975702. The cubic root of 12565534 is about 232.4843108078.

The spelling of 12565534 in words is "twelve million, five hundred sixty-five thousand, five hundred thirty-four".