15240442 has 8 divisors (see below), whose sum is σ = 26126496. Its totient is φ = 6531612.

The previous prime is 15240439. The next prime is 15240497. The reversal of 15240442 is 24404251.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544288 + ... + 544315.

It is an arithmetic number, because the mean of its divisors is an integer number (3265812).

Almost surely, 2^15240442 is an apocalyptic number.

15240442 is a deficient number, since it is larger than the sum of its proper divisors (10886054).

15240442 is a wasteful number, since it uses less digits than its factorization.

15240442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088612.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 15240442 is about 3903.9008696431. The cubic root of 15240442 is about 247.9319640805.

Adding to 15240442 its reverse (24404251), we get a palindrome (39644693).

The spelling of 15240442 in words is "fifteen million, two hundred forty thousand, four hundred forty-two".