15714421 has 4 divisors (see below), whose sum is σ = 15858700. Its totient is φ = 15570144.

The previous prime is 15714407. The next prime is 15714431. The reversal of 15714421 is 12441751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6320196 + 9394225 = 2514^2 + 3065^2 .

It is a cyclic number.

It is not a de Polignac number, because 15714421 - 2⁵ = 15714389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15714431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71976 + ... + 72193.

It is an arithmetic number, because the mean of its divisors is an integer number (3964675).

Almost surely, 2^15714421 is an apocalyptic number.

It is an amenable number.

15714421 is a deficient number, since it is larger than the sum of its proper divisors (144279).

15714421 is a wasteful number, since it uses less digits than its factorization.

15714421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144278.

The product of its digits is 1120, while the sum is 25.

The square root of 15714421 is about 3964.1418995793. The cubic root of 15714421 is about 250.4760051014.

The spelling of 15714421 in words is "fifteen million, seven hundred fourteen thousand, four hundred twenty-one".