12420655 has 12 divisors (see below), whose sum is σ = 16140600. Its totient is φ = 9171552.

The previous prime is 12420649. The next prime is 12420673. The reversal of 12420655 is 55602421.

12420655 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12420655 - 2¹⁵ = 12387887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6505 + ... + 8194.

It is an arithmetic number, because the mean of its divisors is an integer number (1345050).

Almost surely, 2^12420655 is an apocalyptic number.

12420655 is a deficient number, since it is larger than the sum of its proper divisors (3719945).

12420655 is a wasteful number, since it uses less digits than its factorization.

12420655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14730 (or 14717 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 12420655 is about 3524.2949649540. The cubic root of 12420655 is about 231.5873498519.

The spelling of 12420655 in words is "twelve million, four hundred twenty thousand, six hundred fifty-five".