12550091 has 4 divisors (see below), whose sum is σ = 12557184. Its totient is φ = 12543000.

The previous prime is 12550073. The next prime is 12550093. The reversal of 12550091 is 19005521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12550091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12550093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1541 + ... + 5241.

It is an arithmetic number, because the mean of its divisors is an integer number (3139296).

Almost surely, 2^12550091 is an apocalyptic number.

12550091 is a deficient number, since it is larger than the sum of its proper divisors (7093).

12550091 is an equidigital number, since it uses as much as digits as its factorization.

12550091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7092.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 12550091 is about 3542.6107604421. The cubic root of 12550091 is about 232.3890309462.

The spelling of 12550091 in words is "twelve million, five hundred fifty thousand, ninety-one".