12505555 has 8 divisors (see below), whose sum is σ = 15490944. Its totient is φ = 9681600.

The previous prime is 12505543. The next prime is 12505579. The reversal of 12505555 is 55550521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12505555 is a prime.

It is a Duffinian number.

12505555 is a modest number, since divided by 5555 gives 1250 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40186 + ... + 40495.

It is an arithmetic number, because the mean of its divisors is an integer number (1936368).

Almost surely, 2^12505555 is an apocalyptic number.

12505555 is a deficient number, since it is larger than the sum of its proper divisors (2985389).

12505555 is an equidigital number, since it uses as much as digits as its factorization.

12505555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80717.

The product of its (nonzero) digits is 6250, while the sum is 28.

The square root of 12505555 is about 3536.3194143063. The cubic root of 12505555 is about 232.1138152906.

The spelling of 12505555 in words is "twelve million, five hundred five thousand, five hundred fifty-five".