12549617 has 2 divisors, whose sum is σ = 12549618. Its totient is φ = 12549616.

The previous prime is 12549599. The next prime is 12549619. The reversal of 12549617 is 71694521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9740641 + 2808976 = 3121^2 + 1676^2 .

It is a cyclic number.

It is not a de Polignac number, because 12549617 - 2¹² = 12545521 is a prime.

Together with 12549619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12549619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6274808 + 6274809.

It is an arithmetic number, because the mean of its divisors is an integer number (6274809).

Almost surely, 2^12549617 is an apocalyptic number.

It is an amenable number.

12549617 is a deficient number, since it is larger than the sum of its proper divisors (1).

12549617 is an equidigital number, since it uses as much as digits as its factorization.

12549617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

The square root of 12549617 is about 3542.5438599967. The cubic root of 12549617 is about 232.3861052360.

The spelling of 12549617 in words is "twelve million, five hundred forty-nine thousand, six hundred seventeen".