12421716 has 24 divisors (see below), whose sum is σ = 29532384. Its totient is φ = 4062240.

The previous prime is 12421709. The next prime is 12421727. The reversal of 12421716 is 61712421.

12421716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 9130 + ... + 10401.

It is an arithmetic number, because the mean of its divisors is an integer number (1230516).

Almost surely, 2^12421716 is an apocalyptic number.

It is an amenable number.

12421716 is an abundant number, since it is smaller than the sum of its proper divisors (17110668).

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

12421716 is a wasteful number, since it uses less digits than its factorization.

12421716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19591 (or 19589 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 12421716 is about 3524.4454883003. The cubic root of 12421716 is about 231.5939438998.

The spelling of 12421716 in words is "twelve million, four hundred twenty-one thousand, seven hundred sixteen".