12901805 has 16 divisors (see below), whose sum is σ = 17986944. Its totient is φ = 8700480.

The previous prime is 12901799. The next prime is 12901813. The reversal of 12901805 is 50810921.

It is a happy number.

It is not a de Polignac number, because 12901805 - 2¹⁴ = 12885421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 887 + ... + 5156.

It is an arithmetic number, because the mean of its divisors is an integer number (1124184).

Almost surely, 2^12901805 is an apocalyptic number.

It is an amenable number.

12901805 is a deficient number, since it is larger than the sum of its proper divisors (5085139).

12901805 is an equidigital number, since it uses as much as digits as its factorization.

12901805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6116.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 12901805 is about 3591.9082672028. The cubic root of 12901805 is about 234.5399480045.

The spelling of 12901805 in words is "twelve million, nine hundred one thousand, eight hundred five".