12495861 has 12 divisors (see below), whose sum is σ = 20628192. Its totient is φ = 7140456.

The previous prime is 12495853. The next prime is 12495893. The reversal of 12495861 is 16859421.

It is not a de Polignac number, because 12495861 - 2³ = 12495853 is a prime.

It is a super-2 number, since 2×12495861² = 312293084262642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12495841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99111 + ... + 99236.

It is an arithmetic number, because the mean of its divisors is an integer number (1719016).

Almost surely, 2^12495861 is an apocalyptic number.

It is an amenable number.

12495861 is a deficient number, since it is larger than the sum of its proper divisors (8132331).

12495861 is a wasteful number, since it uses less digits than its factorization.

12495861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198360 (or 198357 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 12495861 is about 3534.9485144766. The cubic root of 12495861 is about 232.0538234713.

The spelling of 12495861 in words is "twelve million, four hundred ninety-five thousand, eight hundred sixty-one".