12561416 has 32 divisors (see below), whose sum is σ = 27578880. Its totient is φ = 5251200.

The previous prime is 12561401. The next prime is 12561431. The reversal of 12561416 is 61416521.

12561416 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12561401) and next prime (12561431).

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440 + ... + 5031.

It is an arithmetic number, because the mean of its divisors is an integer number (861840).

Almost surely, 2^12561416 is an apocalyptic number.

It is an amenable number.

12561416 is an abundant number, since it is smaller than the sum of its proper divisors (15017464).

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

12561416 is a wasteful number, since it uses less digits than its factorization.

12561416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5525 (or 5521 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 12561416 is about 3544.2087974610. The cubic root of 12561416 is about 232.4589113038.

Adding to 12561416 its reverse (61416521), we get a palindrome (73977937).

The spelling of 12561416 in words is "twelve million, five hundred sixty-one thousand, four hundred sixteen".