15123242 has 16 divisors (see below), whose sum is σ = 23281992. Its totient is φ = 7365120.

The previous prime is 15123223. The next prime is 15123247. The reversal of 15123242 is 24232151.

15123242 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 4 ways, for example, as 2725801 + 12397441 = 1651^2 + 3521^2 .

It is not an unprimeable number, because it can be changed into a prime (15123247) 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, 13238 + ... + 14334.

Almost surely, 2^15123242 is an apocalyptic number.

15123242 is a deficient number, since it is larger than the sum of its proper divisors (8158750).

15123242 is a wasteful number, since it uses less digits than its factorization.

15123242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273.

The product of its digits is 480, while the sum is 20.

The square root of 15123242 is about 3888.8612729178. The cubic root of 15123242 is about 247.2947902796.

Adding to 15123242 its reverse (24232151), we get a palindrome (39355393).

The spelling of 15123242 in words is "fifteen million, one hundred twenty-three thousand, two hundred forty-two".