12550591 has 8 divisors (see below), whose sum is σ = 13025520. Its totient is φ = 12078528.

The previous prime is 12550589. The next prime is 12550613. The reversal of 12550591 is 19505521.

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 12550591 - 2¹ = 12550589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12550501) 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, 12780 + ... + 13726.

It is an arithmetic number, because the mean of its divisors is an integer number (1628190).

Almost surely, 2^12550591 is an apocalyptic number.

12550591 is the 1894-th nonagonal number.

12550591 is a deficient number, since it is larger than the sum of its proper divisors (474929).

12550591 is an equidigital number, since it uses as much as digits as its factorization.

12550591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433.

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 12550591 is about 3542.6813291630. The cubic root of 12550591 is about 232.3921170586.

The spelling of 12550591 in words is "twelve million, five hundred fifty thousand, five hundred ninety-one".