12740626 has 4 divisors (see below), whose sum is σ = 19110942. Its totient is φ = 6370312.

The previous prime is 12740603. The next prime is 12740639. The reversal of 12740626 is 62604721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62604721 = 173 ⋅361877.

It can be written as a sum of positive squares in only one way, i.e., 7834401 + 4906225 = 2799^2 + 2215^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12740594 and 12740603.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3185155 + ... + 3185158.

Almost surely, 2^12740626 is an apocalyptic number.

12740626 is a deficient number, since it is larger than the sum of its proper divisors (6370316).

12740626 is an equidigital number, since it uses as much as digits as its factorization.

12740626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6370315.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 12740626 is about 3569.4013503668. The cubic root of 12740626 is about 233.5591695581.

It can be divided in two parts, 12740 and 626, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 12740626 in words is "twelve million, seven hundred forty thousand, six hundred twenty-six".