12550639 has 2 divisors, whose sum is σ = 12550640. Its totient is φ = 12550638.

The previous prime is 12550619. The next prime is 12550669. The reversal of 12550639 is 93605521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12550639 - 2¹⁷ = 12419567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12550639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12550619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6275319 + 6275320.

It is an arithmetic number, because the mean of its divisors is an integer number (6275320).

Almost surely, 2^12550639 is an apocalyptic number.

12550639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12550639 is an equidigital number, since it uses as much as digits as its factorization.

12550639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 12550639 is about 3542.6881036862. The cubic root of 12550639 is about 232.3924133210.

The spelling of 12550639 in words is "twelve million, five hundred fifty thousand, six hundred thirty-nine".