12928451 has 4 divisors (see below), whose sum is σ = 13061832. Its totient is φ = 12795072.

The previous prime is 12928439. The next prime is 12928459. The reversal of 12928451 is 15482921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12928451 - 2²² = 8734147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12928459) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 66545 + ... + 66738.

It is an arithmetic number, because the mean of its divisors is an integer number (3265458).

Almost surely, 2^12928451 is an apocalyptic number.

12928451 is a deficient number, since it is larger than the sum of its proper divisors (133381).

12928451 is an equidigital number, since it uses as much as digits as its factorization.

12928451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133380.

The product of its digits is 5760, while the sum is 32.

The square root of 12928451 is about 3595.6155244965. The cubic root of 12928451 is about 234.7013014999.

The spelling of 12928451 in words is "twelve million, nine hundred twenty-eight thousand, four hundred fifty-one".