12409457 has 4 divisors (see below), whose sum is σ = 12673536. Its totient is φ = 12145380.

The previous prime is 12409433. The next prime is 12409459. The reversal of 12409457 is 75490421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75490421 = 17 ⋅4440613.

It is a cyclic number.

It is not a de Polignac number, because 12409457 - 2²² = 8215153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12409459) 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, 131969 + ... + 132062.

It is an arithmetic number, because the mean of its divisors is an integer number (3168384).

Almost surely, 2^12409457 is an apocalyptic number.

It is an amenable number.

12409457 is a deficient number, since it is larger than the sum of its proper divisors (264079).

12409457 is an equidigital number, since it uses as much as digits as its factorization.

12409457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264078.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 12409457 is about 3522.7059201699. The cubic root of 12409457 is about 231.5177320827.

Adding to 12409457 its reverse (75490421), we get a palindrome (87899878).

The spelling of 12409457 in words is "twelve million, four hundred nine thousand, four hundred fifty-seven".