12400845 has 8 divisors (see below), whose sum is σ = 19841376. Its totient is φ = 6613776.

The previous prime is 12400793. The next prime is 12400847. The reversal of 12400845 is 54800421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12400845 - 2¹² = 12396749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413347 + ... + 413376.

It is an arithmetic number, because the mean of its divisors is an integer number (2480172).

Almost surely, 2^12400845 is an apocalyptic number.

12400845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12400845 is a deficient number, since it is larger than the sum of its proper divisors (7440531).

12400845 is an equidigital number, since it uses as much as digits as its factorization.

12400845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826731.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 12400845 is about 3521.4833522253. The cubic root of 12400845 is about 231.4641629346.

The spelling of 12400845 in words is "twelve million, four hundred thousand, eight hundred forty-five".