12428842 has 4 divisors (see below), whose sum is σ = 18643266. Its totient is φ = 6214420.

The previous prime is 12428837. The next prime is 12428891. The reversal of 12428842 is 24882421.

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., 7134241 + 5294601 = 2671^2 + 2301^2 .

It is a super-2 number, since 2×12428842² = 308952226921928, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3107209 + ... + 3107212.

Almost surely, 2^12428842 is an apocalyptic number.

12428842 is a deficient number, since it is larger than the sum of its proper divisors (6214424).

12428842 is an equidigital number, since it uses as much as digits as its factorization.

12428842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6214423.

The product of its digits is 8192, while the sum is 31.

The square root of 12428842 is about 3525.4562825257. The cubic root of 12428842 is about 231.6382218122.

The spelling of 12428842 in words is "twelve million, four hundred twenty-eight thousand, eight hundred forty-two".