12549917 has 4 divisors (see below), whose sum is σ = 12563100. Its totient is φ = 12536736.

The previous prime is 12549913. The next prime is 12550001. The reversal of 12549917 is 71994521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12243001 + 306916 = 3499^2 + 554^2 .

It is a cyclic number.

It is not a de Polignac number, because 12549917 - 2² = 12549913 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 (12549913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5042 + ... + 7107.

It is an arithmetic number, because the mean of its divisors is an integer number (3140775).

Almost surely, 2^12549917 is an apocalyptic number.

It is an amenable number.

12549917 is a deficient number, since it is larger than the sum of its proper divisors (13183).

12549917 is a wasteful number, since it uses less digits than its factorization.

12549917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13182.

The product of its digits is 22680, while the sum is 38.

The square root of 12549917 is about 3542.5862021975. The cubic root of 12549917 is about 232.3879569599.

The spelling of 12549917 in words is "twelve million, five hundred forty-nine thousand, nine hundred seventeen".