12500421 has 16 divisors (see below), whose sum is σ = 17573760. Its totient is φ = 7891520.

The previous prime is 12500419. The next prime is 12500437. The reversal of 12500421 is 12400521.

12500421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12500421 - 2¹ = 12500419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12500421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12500441) 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, 3256 + ... + 5966.

It is an arithmetic number, because the mean of its divisors is an integer number (1098360).

Almost surely, 2^12500421 is an apocalyptic number.

It is an amenable number.

12500421 is a deficient number, since it is larger than the sum of its proper divisors (5073339).

12500421 is a wasteful number, since it uses less digits than its factorization.

12500421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 12500421 is about 3535.5934438224. The cubic root of 12500421 is about 232.0820471299.

Adding to 12500421 its reverse (12400521), we get a palindrome (24900942).

It can be divided in two parts, 12500 and 421, that added together give a palindrome (12921).

The spelling of 12500421 in words is "twelve million, five hundred thousand, four hundred twenty-one".