12396551 has 4 divisors (see below), whose sum is σ = 12411504. Its totient is φ = 12381600.

The previous prime is 12396533. The next prime is 12396557. The reversal of 12396551 is 15569321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15569321 = 23 ⋅676927.

It is a cyclic number.

It is not a de Polignac number, because 12396551 - 2⁶ = 12396487 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 (12396557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6155 + ... + 7916.

It is an arithmetic number, because the mean of its divisors is an integer number (3102876).

Almost surely, 2^12396551 is an apocalyptic number.

12396551 is a deficient number, since it is larger than the sum of its proper divisors (14953).

12396551 is an equidigital number, since it uses as much as digits as its factorization.

12396551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14952.

The product of its digits is 8100, while the sum is 32.

The square root of 12396551 is about 3520.8736131818. The cubic root of 12396551 is about 231.4374437378.

The spelling of 12396551 in words is "twelve million, three hundred ninety-six thousand, five hundred fifty-one".