12840901 has 4 divisors (see below), whose sum is σ = 12850272. Its totient is φ = 12831532.

The previous prime is 12840871. The next prime is 12840911. The reversal of 12840901 is 10904821.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12840901 - 2²¹ = 10743749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12840911) 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, 2185 + ... + 5518.

It is an arithmetic number, because the mean of its divisors is an integer number (3212568).

Almost surely, 2^12840901 is an apocalyptic number.

It is an amenable number.

12840901 is a deficient number, since it is larger than the sum of its proper divisors (9371).

12840901 is an equidigital number, since it uses as much as digits as its factorization.

12840901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9370.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 12840901 is about 3583.4202935185. The cubic root of 12840901 is about 234.1703109126.

The spelling of 12840901 in words is "twelve million, eight hundred forty thousand, nine hundred one".