12102439 has 4 divisors (see below), whose sum is σ = 12628656. Its totient is φ = 11576224.

The previous prime is 12102427. The next prime is 12102457. The reversal of 12102439 is 93420121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93420121 = 1613 ⋅57917.

It is a cyclic number.

It is not a de Polignac number, because 12102439 - 2⁹ = 12101927 is a prime.

12102439 is a modest number, since divided by 2439 gives 121 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102469) 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 in 3 ways as a sum of consecutive naturals, for example, 263074 + ... + 263119.

It is an arithmetic number, because the mean of its divisors is an integer number (3157164).

Almost surely, 2^12102439 is an apocalyptic number.

12102439 is a deficient number, since it is larger than the sum of its proper divisors (526217).

12102439 is an equidigital number, since it uses as much as digits as its factorization.

12102439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526216.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 12102439 is about 3478.8559901209. The cubic root of 12102439 is about 229.5924667307.

The spelling of 12102439 in words is "twelve million, one hundred two thousand, four hundred thirty-nine".