12404451 has 4 divisors (see below), whose sum is σ = 16539272. Its totient is φ = 8269632.

The previous prime is 12404449. The next prime is 12404453. The reversal of 12404451 is 15440421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12404449) and next prime (12404453).

It is not a de Polignac number, because 12404451 - 2¹ = 12404449 is a prime.

It is a super-2 number, since 2×12404451² = 307740809222802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12404453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2067406 + ... + 2067411.

It is an arithmetic number, because the mean of its divisors is an integer number (4134818).

Almost surely, 2^12404451 is an apocalyptic number.

12404451 is a deficient number, since it is larger than the sum of its proper divisors (4134821).

12404451 is an equidigital number, since it uses as much as digits as its factorization.

12404451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134820.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 12404451 is about 3521.9953151587. The cubic root of 12404451 is about 231.4865963221.

Adding to 12404451 its reverse (15440421), we get a palindrome (27844872).

The spelling of 12404451 in words is "twelve million, four hundred four thousand, four hundred fifty-one".