15421423 has 2 divisors, whose sum is σ = 15421424. Its totient is φ = 15421422.

The previous prime is 15421411. The next prime is 15421447. The reversal of 15421423 is 32412451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15421423 - 2²¹ = 13324271 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15421394 and 15421403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15421493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7710711 + 7710712.

It is an arithmetic number, because the mean of its divisors is an integer number (7710712).

Almost surely, 2^15421423 is an apocalyptic number.

15421423 is a deficient number, since it is larger than the sum of its proper divisors (1).

15421423 is an equidigital number, since it uses as much as digits as its factorization.

15421423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 22.

The square root of 15421423 is about 3927.0119684055. The cubic root of 15421423 is about 248.9095062094.

Adding to 15421423 its reverse (32412451), we get a palindrome (47833874).

The spelling of 15421423 in words is "fifteen million, four hundred twenty-one thousand, four hundred twenty-three".