12440869 has 4 divisors (see below), whose sum is σ = 14218144. Its totient is φ = 10663596.

The previous prime is 12440867. The next prime is 12440873. The reversal of 12440869 is 96804421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12440869 - 2¹ = 12440867 is a prime.

It is a super-2 number, since 2×12440869² = 309550442950322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 888627 + ... + 888640.

It is an arithmetic number, because the mean of its divisors is an integer number (3554536).

Almost surely, 2^12440869 is an apocalyptic number.

It is an amenable number.

12440869 is a deficient number, since it is larger than the sum of its proper divisors (1777275).

12440869 is an equidigital number, since it uses as much as digits as its factorization.

12440869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777274.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 12440869 is about 3527.1616067314. The cubic root of 12440869 is about 231.7129140687.

The spelling of 12440869 in words is "twelve million, four hundred forty thousand, eight hundred sixty-nine".