12487457 has 4 divisors (see below), whose sum is σ = 12517680. Its totient is φ = 12457236.

The previous prime is 12487421. The next prime is 12487483. The reversal of 12487457 is 75478421.

12487457 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75478421 = 2591 ⋅29131.

It is a cyclic number.

It is not a de Polignac number, because 12487457 - 2⁸ = 12487201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12487457.

It is not an unprimeable number, because it can be changed into a prime (12487417) 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, 14483 + ... + 15320.

It is an arithmetic number, because the mean of its divisors is an integer number (3129420).

Almost surely, 2^12487457 is an apocalyptic number.

It is an amenable number.

12487457 is a deficient number, since it is larger than the sum of its proper divisors (30223).

12487457 is an equidigital number, since it uses as much as digits as its factorization.

12487457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30222.

The product of its digits is 62720, while the sum is 38.

The square root of 12487457 is about 3533.7596126505. The cubic root of 12487457 is about 232.0017897702.

The spelling of 12487457 in words is "twelve million, four hundred eighty-seven thousand, four hundred fifty-seven".