12565963 has 4 divisors (see below), whose sum is σ = 12584160. Its totient is φ = 12547768.

The previous prime is 12565937. The next prime is 12565991. The reversal of 12565963 is 36956521.

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

It is a cyclic number.

It is not a de Polignac number, because 12565963 - 2¹³ = 12557771 is a prime.

It is a super-2 number, since 2×12565963² = 315806852234738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12565463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8020 + ... + 9457.

It is an arithmetic number, because the mean of its divisors is an integer number (3146040).

Almost surely, 2^12565963 is an apocalyptic number.

12565963 is a deficient number, since it is larger than the sum of its proper divisors (18197).

12565963 is an equidigital number, since it uses as much as digits as its factorization.

12565963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18196.

The product of its digits is 48600, while the sum is 37.

The square root of 12565963 is about 3544.8502084009. The cubic root of 12565963 is about 232.4869565273.

The spelling of 12565963 in words is "twelve million, five hundred sixty-five thousand, nine hundred sixty-three".