12461661 has 16 divisors (see below), whose sum is σ = 18645120. Its totient is φ = 8225280.

The previous prime is 12461651. The next prime is 12461689. The reversal of 12461661 is 16616421.

It is not a de Polignac number, because 12461661 - 2¹⁷ = 12330589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12461641) 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, 541 + ... + 5021.

It is an arithmetic number, because the mean of its divisors is an integer number (1165320).

Almost surely, 2^12461661 is an apocalyptic number.

It is an amenable number.

12461661 is a deficient number, since it is larger than the sum of its proper divisors (6183459).

12461661 is a wasteful number, since it uses less digits than its factorization.

12461661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4593 (or 4587 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 12461661 is about 3530.1077887226. The cubic root of 12461661 is about 231.8419268537.

The spelling of 12461661 in words is "twelve million, four hundred sixty-one thousand, six hundred sixty-one".