15209242 has 8 divisors (see below), whose sum is σ = 22834656. Its totient is φ = 7597692.

The previous prime is 15209221. The next prime is 15209261. The reversal of 15209242 is 24290251.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48 + ... + 5515.

It is an arithmetic number, because the mean of its divisors is an integer number (2854332).

Almost surely, 2^15209242 is an apocalyptic number.

15209242 is a deficient number, since it is larger than the sum of its proper divisors (7625414).

15209242 is a wasteful number, since it uses less digits than its factorization.

15209242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6932.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 15209242 is about 3899.9028193020. The cubic root of 15209242 is about 247.7626609868.

Adding to 15209242 its reverse (24290251), we get a palindrome (39499493).

It can be divided in two parts, 15209 and 242, that added together give a palindrome (15451).

The spelling of 15209242 in words is "fifteen million, two hundred nine thousand, two hundred forty-two".