12420881 has 16 divisors (see below), whose sum is σ = 13981248. Its totient is φ = 10939200.

The previous prime is 12420871. The next prime is 12420887. The reversal of 12420881 is 18802421.

12420881 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12420881 - 2¹⁸ = 12158737 is a prime.

It is a super-2 number, since 2×12420881² = 308556569632322, 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 12420881.

It is not an unprimeable number, because it can be changed into a prime (12420887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71711 + ... + 71883.

It is an arithmetic number, because the mean of its divisors is an integer number (873828).

Almost surely, 2^12420881 is an apocalyptic number.

12420881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12420881 is a deficient number, since it is larger than the sum of its proper divisors (1560367).

12420881 is a wasteful number, since it uses less digits than its factorization.

12420881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 12420881 is about 3524.3270279587. The cubic root of 12420881 is about 231.5887544591.

The spelling of 12420881 in words is "twelve million, four hundred twenty thousand, eight hundred eighty-one".