12461881 has 4 divisors (see below), whose sum is σ = 12590452. Its totient is φ = 12333312.

The previous prime is 12461831. The next prime is 12461887. The reversal of 12461881 is 18816421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9517225 + 2944656 = 3085^2 + 1716^2 .

It is a cyclic number.

It is not a de Polignac number, because 12461881 - 2⁹ = 12461369 is a prime.

It is a super-2 number, since 2×12461881² = 310596956116322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12461887) 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, 64140 + ... + 64333.

It is an arithmetic number, because the mean of its divisors is an integer number (3147613).

Almost surely, 2^12461881 is an apocalyptic number.

It is an amenable number.

12461881 is a deficient number, since it is larger than the sum of its proper divisors (128571).

12461881 is an equidigital number, since it uses as much as digits as its factorization.

12461881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128570.

The product of its digits is 3072, while the sum is 31.

The square root of 12461881 is about 3530.1389491067. The cubic root of 12461881 is about 231.8432911695.

The spelling of 12461881 in words is "twelve million, four hundred sixty-one thousand, eight hundred eighty-one".