12431649 has 16 divisors (see below), whose sum is σ = 16990208. Its totient is φ = 8083152.

The previous prime is 12431621. The next prime is 12431663. The reversal of 12431649 is 94613421.

12431649 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12431649 - 2¹³ = 12423457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12431689) 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, 25284 + ... + 25770.

It is an arithmetic number, because the mean of its divisors is an integer number (1061888).

Almost surely, 2^12431649 is an apocalyptic number.

It is an amenable number.

12431649 is a deficient number, since it is larger than the sum of its proper divisors (4558559).

12431649 is a wasteful number, since it uses less digits than its factorization.

12431649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684.

The product of its digits is 5184, while the sum is 30.

The square root of 12431649 is about 3525.8543645477. The cubic root of 12431649 is about 231.6556586618.

The spelling of 12431649 in words is "twelve million, four hundred thirty-one thousand, six hundred forty-nine".