12740522 has 4 divisors (see below), whose sum is σ = 19110786. Its totient is φ = 6370260.

The previous prime is 12740503. The next prime is 12740549. The reversal of 12740522 is 22504721.

It is a happy number.

12740522 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: 22504721 = 19 ⋅1184459.

It can be written as a sum of positive squares in only one way, i.e., 8934121 + 3806401 = 2989^2 + 1951^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3185129 + ... + 3185132.

Almost surely, 2^12740522 is an apocalyptic number.

12740522 is a deficient number, since it is larger than the sum of its proper divisors (6370264).

12740522 is an equidigital number, since it uses as much as digits as its factorization.

12740522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6370263.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 12740522 is about 3569.3867820678. The cubic root of 12740522 is about 233.5585340524.

The spelling of 12740522 in words is "twelve million, seven hundred forty thousand, five hundred twenty-two".