15240842 has 4 divisors (see below), whose sum is σ = 22861266. Its totient is φ = 7620420.

The previous prime is 15240833. The next prime is 15240851. The reversal of 15240842 is 24804251.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (15240833) and next prime (15240851).

It can be written as a sum of positive squares in only one way, i.e., 11895601 + 3345241 = 3449^2 + 1829^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3810209 + ... + 3810212.

Almost surely, 2^15240842 is an apocalyptic number.

15240842 is a deficient number, since it is larger than the sum of its proper divisors (7620424).

15240842 is an equidigital number, since it uses as much as digits as its factorization.

15240842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7620423.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 15240842 is about 3903.9521001160. The cubic root of 15240842 is about 247.9341331322.

The spelling of 15240842 in words is "fifteen million, two hundred forty thousand, eight hundred forty-two".