12618457 has 4 divisors (see below), whose sum is σ = 13025536. Its totient is φ = 12211380.

The previous prime is 12618449. The next prime is 12618461. The reversal of 12618457 is 75481621.

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.

It is a cyclic number.

It is not a de Polignac number, because 12618457 - 2³ = 12618449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12618497) 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, 203493 + ... + 203554.

It is an arithmetic number, because the mean of its divisors is an integer number (3256384).

Almost surely, 2^12618457 is an apocalyptic number.

It is an amenable number.

12618457 is a deficient number, since it is larger than the sum of its proper divisors (407079).

12618457 is an equidigital number, since it uses as much as digits as its factorization.

12618457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407078.

The product of its digits is 13440, while the sum is 34.

The square root of 12618457 is about 3552.2467538165. The cubic root of 12618457 is about 232.8102429432.

The spelling of 12618457 in words is "twelve million, six hundred eighteen thousand, four hundred fifty-seven".