15105242 has 4 divisors (see below), whose sum is σ = 22657866. Its totient is φ = 7552620.

The previous prime is 15105199. The next prime is 15105263. The reversal of 15105242 is 24250151.

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

It can be written as a sum of positive squares in only one way, i.e., 10699441 + 4405801 = 3271^2 + 2099^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3776309 + ... + 3776312.

Almost surely, 2^15105242 is an apocalyptic number.

15105242 is a deficient number, since it is larger than the sum of its proper divisors (7552624).

15105242 is an equidigital number, since it uses as much as digits as its factorization.

15105242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7552623.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 15105242 is about 3886.5462817262. The cubic root of 15105242 is about 247.1966395126.

Adding to 15105242 its reverse (24250151), we get a palindrome (39355393).

The spelling of 15105242 in words is "fifteen million, one hundred five thousand, two hundred forty-two".