15225242 has 4 divisors (see below), whose sum is σ = 22837866. Its totient is φ = 7612620.

The previous prime is 15225239. The next prime is 15225253. The reversal of 15225242 is 24252251.

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., 14661241 + 564001 = 3829^2 + 751^2 .

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, 3806309 + ... + 3806312.

Almost surely, 2^15225242 is an apocalyptic number.

15225242 is a deficient number, since it is larger than the sum of its proper divisors (7612624).

15225242 is an equidigital number, since it uses as much as digits as its factorization.

15225242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7612623.

The product of its digits is 1600, while the sum is 23.

The square root of 15225242 is about 3901.9536132558. The cubic root of 15225242 is about 247.8495119792.

Adding to 15225242 its reverse (24252251), we get a palindrome (39477493).

The spelling of 15225242 in words is "fifteen million, two hundred twenty-five thousand, two hundred forty-two".