12506239 has 2 divisors, whose sum is σ = 12506240. Its totient is φ = 12506238.

The previous prime is 12506233. The next prime is 12506257. The reversal of 12506239 is 93260521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12506239 - 2¹³ = 12498047 is a prime.

It is equal to p₈₁₉₀₆₄ and since 12506239 and 819064 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12506233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6253119 + 6253120.

It is an arithmetic number, because the mean of its divisors is an integer number (6253120).

Almost surely, 2^12506239 is an apocalyptic number.

12506239 is a deficient number, since it is larger than the sum of its proper divisors (1).

12506239 is an equidigital number, since it uses as much as digits as its factorization.

12506239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 12506239 is about 3536.4161237049. The cubic root of 12506239 is about 232.1180470888.

The spelling of 12506239 in words is "twelve million, five hundred six thousand, two hundred thirty-nine".