12553561 has 8 divisors (see below), whose sum is σ = 13224384. Its totient is φ = 11893200.

The previous prime is 12553553. The next prime is 12553573. The reversal of 12553561 is 16535521.

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 12553561 - 2³ = 12553553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12553511) 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, 90 + ... + 5011.

It is an arithmetic number, because the mean of its divisors is an integer number (1653048).

Almost surely, 2^12553561 is an apocalyptic number.

It is an amenable number.

12553561 is a deficient number, since it is larger than the sum of its proper divisors (670823).

12553561 is a wasteful number, since it uses less digits than its factorization.

12553561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5231.

The product of its digits is 4500, while the sum is 28.

The square root of 12553561 is about 3543.1004783946. The cubic root of 12553561 is about 232.4104468767.

The spelling of 12553561 in words is "twelve million, five hundred fifty-three thousand, five hundred sixty-one".