12516861 has 16 divisors (see below), whose sum is σ = 19124864. Its totient is φ = 7133184.

The previous prime is 12516859. The next prime is 12516863. The reversal of 12516861 is 16861521.

It is an interprime number because it is at equal distance from previous prime (12516859) and next prime (12516863).

It is not a de Polignac number, because 12516861 - 2¹ = 12516859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12516863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11601 + ... + 12633.

It is an arithmetic number, because the mean of its divisors is an integer number (1195304).

Almost surely, 2^12516861 is an apocalyptic number.

It is an amenable number.

12516861 is a deficient number, since it is larger than the sum of its proper divisors (6608003).

12516861 is a wasteful number, since it uses less digits than its factorization.

12516861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620.

The product of its digits is 2880, while the sum is 30.

The square root of 12516861 is about 3537.9176078592. The cubic root of 12516861 is about 232.1837439034.

The spelling of 12516861 in words is "twelve million, five hundred sixteen thousand, eight hundred sixty-one".