12355649 has 2 divisors, whose sum is σ = 12355650. Its totient is φ = 12355648.

The previous prime is 12355631. The next prime is 12355657. The reversal of 12355649 is 94655321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9610000 + 2745649 = 3100^2 + 1657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12355649 is a prime.

It is a super-2 number, since 2×12355649² = 305324124422402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12352649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6177824 + 6177825.

It is an arithmetic number, because the mean of its divisors is an integer number (6177825).

Almost surely, 2^12355649 is an apocalyptic number.

It is an amenable number.

12355649 is a deficient number, since it is larger than the sum of its proper divisors (1).

12355649 is an equidigital number, since it uses as much as digits as its factorization.

12355649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 35.

The square root of 12355649 is about 3515.0603124271. The cubic root of 12355649 is about 231.1826232735.

The spelling of 12355649 in words is "twelve million, three hundred fifty-five thousand, six hundred forty-nine".