12565878 has 64 divisors (see below), whose sum is σ = 29164800. Its totient is φ = 3576960.

The previous prime is 12565871. The next prime is 12565919. The reversal of 12565878 is 87856521.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12565871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90333 + ... + 90471.

It is an arithmetic number, because the mean of its divisors is an integer number (455700).

Almost surely, 2^12565878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12565878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14582400).

12565878 is an abundant number, since it is smaller than the sum of its proper divisors (16598922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12565878 is a wasteful number, since it uses less digits than its factorization.

12565878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237.

The product of its digits is 134400, while the sum is 42.

The square root of 12565878 is about 3544.8382191575. The cubic root of 12565878 is about 232.4864323219.

The spelling of 12565878 in words is "twelve million, five hundred sixty-five thousand, eight hundred seventy-eight".