15421248 has 84 divisors (see below), whose sum is σ = 45349668. Its totient is φ = 5007360.

The previous prime is 15421213. The next prime is 15421249. The reversal of 15421248 is 84212451.

15421248 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1937664 + 13483584 = 1392^2 + 3672^2 .

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 11 ways as a sum of consecutive naturals, for example, 23290 + ... + 23942.

It is an arithmetic number, because the mean of its divisors is an integer number (539877).

Almost surely, 2^15421248 is an apocalyptic number.

15421248 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15421248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22674834).

15421248 is an abundant number, since it is smaller than the sum of its proper divisors (29928420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15421248 is a wasteful number, since it uses less digits than its factorization.

15421248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 699 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 15421248 is about 3926.9896867703. The cubic root of 15421248 is about 248.9085646765.

Adding to 15421248 its reverse (84212451), we get a palindrome (99633699).

The spelling of 15421248 in words is "fifteen million, four hundred twenty-one thousand, two hundred forty-eight".