12520642 has 4 divisors (see below), whose sum is σ = 18780966. Its totient is φ = 6260320.

The previous prime is 12520603. The next prime is 12520643. The reversal of 12520642 is 24602521.

12520642 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: 24602521 = 37 ⋅664933.

It can be written as a sum of positive squares in only one way, i.e., 12397441 + 123201 = 3521^2 + 351^2 .

It is a super-3 number, since 3×12520642³ (a number of 22 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12520643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3130159 + ... + 3130162.

Almost surely, 2^12520642 is an apocalyptic number.

12520642 is a deficient number, since it is larger than the sum of its proper divisors (6260324).

12520642 is an equidigital number, since it uses as much as digits as its factorization.

12520642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6260323.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 12520642 is about 3538.4519213916. The cubic root of 12520642 is about 232.2071203275.

The spelling of 12520642 in words is "twelve million, five hundred twenty thousand, six hundred forty-two".