12461391 has 24 divisors (see below), whose sum is σ = 19623440. Its totient is φ = 7814016.

The previous prime is 12461389. The next prime is 12461401. The reversal of 12461391 is 19316421.

It is not a de Polignac number, because 12461391 - 2¹ = 12461389 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 (12461311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7005 + ... + 8601.

Almost surely, 2^12461391 is an apocalyptic number.

12461391 is a deficient number, since it is larger than the sum of its proper divisors (7162049).

12461391 is a wasteful number, since it uses less digits than its factorization.

12461391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640 (or 1617 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 12461391 is about 3530.0695460571. The cubic root of 12461391 is about 231.8402524441.

The spelling of 12461391 in words is "twelve million, four hundred sixty-one thousand, three hundred ninety-one".