12265639 has 2 divisors, whose sum is σ = 12265640. Its totient is φ = 12265638.

The previous prime is 12265633. The next prime is 12265667. The reversal of 12265639 is 93656221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12265639 - 2⁷ = 12265511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12265633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6132819 + 6132820.

It is an arithmetic number, because the mean of its divisors is an integer number (6132820).

Almost surely, 2^12265639 is an apocalyptic number.

12265639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12265639 is an equidigital number, since it uses as much as digits as its factorization.

12265639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 34.

The square root of 12265639 is about 3502.2334302556. The cubic root of 12265639 is about 230.6198716799.

The spelling of 12265639 in words is "twelve million, two hundred sixty-five thousand, six hundred thirty-nine".