12405906 has 16 divisors (see below), whose sum is σ = 27568800. Its totient is φ = 4135284.

The previous prime is 12405893. The next prime is 12405919. The reversal of 12405906 is 60950421.

12405906 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12405893) and next prime (12405919).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 12405906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114816 + ... + 114923.

It is an arithmetic number, because the mean of its divisors is an integer number (1723050).

Almost surely, 2^12405906 is an apocalyptic number.

12405906 is an abundant number, since it is smaller than the sum of its proper divisors (15162894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12405906 is a wasteful number, since it uses less digits than its factorization.

12405906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229750 (or 229744 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 12405906 is about 3522.2018681501. The cubic root of 12405906 is about 231.4956468323.

The spelling of 12405906 in words is "twelve million, four hundred five thousand, nine hundred six".