15421243 has 8 divisors (see below), whose sum is σ = 16225200. Its totient is φ = 14635488.

The previous prime is 15421213. The next prime is 15421249. The reversal of 15421243 is 34212451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-15421243 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 2796 + ... + 6217.

It is an arithmetic number, because the mean of its divisors is an integer number (2028150).

Almost surely, 2^15421243 is an apocalyptic number.

15421243 is a deficient number, since it is larger than the sum of its proper divisors (803957).

15421243 is an equidigital number, since it uses as much as digits as its factorization.

15421243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9101.

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

The square root of 15421243 is about 3926.9890501503. The cubic root of 15421243 is about 248.9085377755.

Adding to 15421243 its reverse (34212451), we get a palindrome (49633694).

The spelling of 15421243 in words is "fifteen million, four hundred twenty-one thousand, two hundred forty-three".