12458639 has 2 divisors, whose sum is σ = 12458640. Its totient is φ = 12458638.

The previous prime is 12458609. The next prime is 12458647. The reversal of 12458639 is 93685421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12458639 - 2¹⁶ = 12393103 is a prime.

It is a super-3 number, since 3×12458639³ (a number of 22 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12458609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6229319 + 6229320.

It is an arithmetic number, because the mean of its divisors is an integer number (6229320).

Almost surely, 2^12458639 is an apocalyptic number.

12458639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12458639 is an equidigital number, since it uses as much as digits as its factorization.

12458639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 12458639 is about 3529.6797305138. The cubic root of 12458639 is about 231.8231844900.

The spelling of 12458639 in words is "twelve million, four hundred fifty-eight thousand, six hundred thirty-nine".