12457618 has 4 divisors (see below), whose sum is σ = 18686430. Its totient is φ = 6228808.

The previous prime is 12457609. The next prime is 12457619. The reversal of 12457618 is 81675421.

12457618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81675421 = 31 ⋅2634691.

It can be written as a sum of positive squares in only one way, i.e., 8485569 + 3972049 = 2913^2 + 1993^2 .

It is not an unprimeable number, because it can be changed into a prime (12457619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3114403 + ... + 3114406.

Almost surely, 2^12457618 is an apocalyptic number.

12457618 is a deficient number, since it is larger than the sum of its proper divisors (6228812).

12457618 is an equidigital number, since it uses as much as digits as its factorization.

12457618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6228811.

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

The square root of 12457618 is about 3529.5350968647. The cubic root of 12457618 is about 231.8168515902.

The spelling of 12457618 in words is "twelve million, four hundred fifty-seven thousand, six hundred eighteen".