15421424 has 10 divisors (see below), whose sum is σ = 29879040. Its totient is φ = 7710704.

The previous prime is 15421423. The next prime is 15421447. The reversal of 15421424 is 42412451.

It is a self number, because there is not a number n which added to its sum of digits gives 15421424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15421423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 481904 + ... + 481935.

It is an arithmetic number, because the mean of its divisors is an integer number (2987904).

Almost surely, 2^15421424 is an apocalyptic number.

It is an amenable number.

15421424 is a deficient number, since it is larger than the sum of its proper divisors (14457616).

15421424 is an equidigital number, since it uses as much as digits as its factorization.

15421424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963847 (or 963841 counting only the distinct ones).

The product of its digits is 1280, while the sum is 23.

The square root of 15421424 is about 3927.0120957288. The cubic root of 15421424 is about 248.9095115896.

Adding to 15421424 its reverse (42412451), we get a palindrome (57833875).

The spelling of 15421424 in words is "fifteen million, four hundred twenty-one thousand, four hundred twenty-four".