12912455 has 4 divisors (see below), whose sum is σ = 15494952. Its totient is φ = 10329960.

The previous prime is 12912437. The next prime is 12912479. The reversal of 12912455 is 55421921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55421921 = 17 ⋅3260113.

It is not a de Polignac number, because 12912455 - 2⁶ = 12912391 is a prime.

It is a Duffinian number.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 1291241 + ... + 1291250.

It is an arithmetic number, because the mean of its divisors is an integer number (3873738).

Almost surely, 2^12912455 is an apocalyptic number.

12912455 is a deficient number, since it is larger than the sum of its proper divisors (2582497).

12912455 is an equidigital number, since it uses as much as digits as its factorization.

12912455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582496.

The product of its digits is 3600, while the sum is 29.

The square root of 12912455 is about 3593.3904602756. The cubic root of 12912455 is about 234.6044651648.

The spelling of 12912455 in words is "twelve million, nine hundred twelve thousand, four hundred fifty-five".