12401649 has 12 divisors (see below), whose sum is σ = 19291636. Its totient is φ = 7631712.

The previous prime is 12401593. The next prime is 12401671. The reversal of 12401649 is 94610421.

12401649 is a `hidden beast` number, since 12 + 4 + 0 + 1 + 649 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3038049 + 9363600 = 1743^2 + 3060^2 .

It is not a de Polignac number, because 12401649 - 2¹³ = 12393457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12401149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52882 + ... + 53115.

Almost surely, 2^12401649 is an apocalyptic number.

It is an amenable number.

12401649 is a deficient number, since it is larger than the sum of its proper divisors (6889987).

12401649 is a wasteful number, since it uses less digits than its factorization.

12401649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106016 (or 106013 counting only the distinct ones).

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

The square root of 12401649 is about 3521.5975068142. The cubic root of 12401649 is about 231.4691650982.

The spelling of 12401649 in words is "twelve million, four hundred one thousand, six hundred forty-nine".