12457551 has 4 divisors (see below), whose sum is σ = 16610072. Its totient is φ = 8305032.

The previous prime is 12457537. The next prime is 12457579. The reversal of 12457551 is 15575421.

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

It is not a de Polignac number, because 12457551 - 2⁵ = 12457519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12457591) 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, 2076256 + ... + 2076261.

It is an arithmetic number, because the mean of its divisors is an integer number (4152518).

Almost surely, 2^12457551 is an apocalyptic number.

12457551 is a deficient number, since it is larger than the sum of its proper divisors (4152521).

12457551 is an equidigital number, since it uses as much as digits as its factorization.

12457551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4152520.

The product of its digits is 7000, while the sum is 30.

The square root of 12457551 is about 3529.5256055170. The cubic root of 12457551 is about 231.8164360010.

It can be divided in two parts, 124 and 57551, that added together give a palindrome (57675).

The spelling of 12457551 in words is "twelve million, four hundred fifty-seven thousand, five hundred fifty-one".