12628442 has 4 divisors (see below), whose sum is σ = 18942666. Its totient is φ = 6314220.

The previous prime is 12628423. The next prime is 12628457. The reversal of 12628442 is 24482621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24482621 = 19 ⋅1288559.

It can be written as a sum of positive squares in only one way, i.e., 10883401 + 1745041 = 3299^2 + 1321^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3157109 + ... + 3157112.

Almost surely, 2^12628442 is an apocalyptic number.

12628442 is a deficient number, since it is larger than the sum of its proper divisors (6314224).

12628442 is an equidigital number, since it uses as much as digits as its factorization.

12628442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6314223.

The product of its digits is 6144, while the sum is 29.

The square root of 12628442 is about 3553.6519244293. The cubic root of 12628442 is about 232.8716344268.

The spelling of 12628442 in words is "twelve million, six hundred twenty-eight thousand, four hundred forty-two".