12403449 has 12 divisors (see below), whose sum is σ = 18580016. Its totient is φ = 8268804.

The previous prime is 12403439. The next prime is 12403451. The reversal of 12403449 is 94430421.

It is not a de Polignac number, because 12403449 - 2¹⁵ = 12370681 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12403439) 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, 25279 + ... + 25764.

Almost surely, 2^12403449 is an apocalyptic number.

It is an amenable number.

12403449 is a deficient number, since it is larger than the sum of its proper divisors (6176567).

12403449 is an frugal number, since it uses more digits than its factorization.

12403449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51058 (or 51046 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 12403449 is about 3521.8530633745. The cubic root of 12403449 is about 231.4803631881.

The spelling of 12403449 in words is "twelve million, four hundred three thousand, four hundred forty-nine".