12642554 has 4 divisors (see below), whose sum is σ = 18963834. Its totient is φ = 6321276.

The previous prime is 12642547. The next prime is 12642569. The reversal of 12642554 is 45524621.

12642554 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.

It can be written as a sum of positive squares in only one way, i.e., 11042329 + 1600225 = 3323^2 + 1265^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3160637 + ... + 3160640.

Almost surely, 2^12642554 is an apocalyptic number.

12642554 is a deficient number, since it is larger than the sum of its proper divisors (6321280).

12642554 is an equidigital number, since it uses as much as digits as its factorization.

12642554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6321279.

The product of its digits is 9600, while the sum is 29.

The square root of 12642554 is about 3555.6369330965. The cubic root of 12642554 is about 232.9583450743.

The spelling of 12642554 in words is "twelve million, six hundred forty-two thousand, five hundred fifty-four".