15421379 has 2 divisors, whose sum is σ = 15421380. Its totient is φ = 15421378.

The previous prime is 15421337. The next prime is 15421409. The reversal of 15421379 is 97312451.

It is a strong prime.

It is an emirp because it is prime and its reverse (97312451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15421379 - 2¹⁶ = 15355843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15421309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7710689 + 7710690.

It is an arithmetic number, because the mean of its divisors is an integer number (7710690).

Almost surely, 2^15421379 is an apocalyptic number.

15421379 is a deficient number, since it is larger than the sum of its proper divisors (1).

15421379 is an equidigital number, since it uses as much as digits as its factorization.

15421379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 15421379 is about 3927.0063661777. The cubic root of 15421379 is about 248.9092694818.

The spelling of 15421379 in words is "fifteen million, four hundred twenty-one thousand, three hundred seventy-nine".