12510861 has 32 divisors (see below), whose sum is σ = 19958400. Its totient is φ = 6881280.

The previous prime is 12510853. The next prime is 12510871. The reversal of 12510861 is 16801521.

It is not a de Polignac number, because 12510861 - 2³ = 12510853 is a prime.

It is a super-2 number, since 2×12510861² = 313043285922642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12510811) 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, 15885 + ... + 16653.

It is an arithmetic number, because the mean of its divisors is an integer number (623700).

Almost surely, 2^12510861 is an apocalyptic number.

12510861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12510861 is a deficient number, since it is larger than the sum of its proper divisors (7447539).

12510861 is a wasteful number, since it uses less digits than its factorization.

12510861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 12510861 is about 3537.0695497827. The cubic root of 12510861 is about 232.1466386175.

The spelling of 12510861 in words is "twelve million, five hundred ten thousand, eight hundred sixty-one".