12845431 has 4 divisors (see below), whose sum is σ = 13403952. Its totient is φ = 12286912.

The previous prime is 12845411. The next prime is 12845449. The reversal of 12845431 is 13454821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13454821 = 1283 ⋅10487.

It is a cyclic number.

It is not a de Polignac number, because 12845431 - 2¹⁵ = 12812663 is a prime.

It is a super-2 number, since 2×12845431² = 330010195151522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12845431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12845411) 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, 279226 + ... + 279271.

It is an arithmetic number, because the mean of its divisors is an integer number (3350988).

Almost surely, 2^12845431 is an apocalyptic number.

12845431 is a deficient number, since it is larger than the sum of its proper divisors (558521).

12845431 is an equidigital number, since it uses as much as digits as its factorization.

12845431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558520.

The product of its digits is 3840, while the sum is 28.

The square root of 12845431 is about 3584.0523154664. The cubic root of 12845431 is about 234.1978444631.

The spelling of 12845431 in words is "twelve million, eight hundred forty-five thousand, four hundred thirty-one".