15421245 has 32 divisors (see below), whose sum is σ = 28366848. Its totient is φ = 7007808.

The previous prime is 15421213. The next prime is 15421249. The reversal of 15421245 is 54212451.

It is not a de Polignac number, because 15421245 - 2⁵ = 15421213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15421249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23512 + ... + 24158.

It is an arithmetic number, because the mean of its divisors is an integer number (886464).

Almost surely, 2^15421245 is an apocalyptic number.

15421245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15421245 is a deficient number, since it is larger than the sum of its proper divisors (12945603).

15421245 is a wasteful number, since it uses less digits than its factorization.

15421245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889.

The product of its digits is 1600, while the sum is 24.

The square root of 15421245 is about 3926.9893047983. The cubic root of 15421245 is about 248.9085485359.

Adding to 15421245 its reverse (54212451), we get a palindrome (69633696).

The spelling of 15421245 in words is "fifteen million, four hundred twenty-one thousand, two hundred forty-five".