12555961 has 8 divisors (see below), whose sum is σ = 14139648. Its totient is φ = 11046000.

The previous prime is 12555947. The next prime is 12555989. The reversal of 12555961 is 16955521.

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

It is a cyclic number.

It is not a de Polignac number, because 12555961 - 2⁷ = 12555833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12555931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18070 + ... + 18751.

It is an arithmetic number, because the mean of its divisors is an integer number (1767456).

Almost surely, 2^12555961 is an apocalyptic number.

12555961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12555961 is a deficient number, since it is larger than the sum of its proper divisors (1583687).

12555961 is a wasteful number, since it uses less digits than its factorization.

12555961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36863.

The product of its digits is 13500, while the sum is 34.

The square root of 12555961 is about 3543.4391486238. The cubic root of 12555961 is about 232.4252567390.

The spelling of 12555961 in words is "twelve million, five hundred fifty-five thousand, nine hundred sixty-one".