15242725 has 6 divisors (see below), whose sum is σ = 18901010. Its totient is φ = 12194160.

The previous prime is 15242699. The next prime is 15242729. The reversal of 15242725 is 52724251.

It can be written as a sum of positive squares in 3 ways, for example, as 133956 + 15108769 = 366^2 + 3887^2 .

It is a de Polignac number, because none of the positive numbers 2^k-15242725 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15242693 and 15242702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15242729) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 304830 + ... + 304879.

Almost surely, 2^15242725 is an apocalyptic number.

It is an amenable number.

15242725 is a deficient number, since it is larger than the sum of its proper divisors (3658285).

15242725 is an equidigital number, since it uses as much as digits as its factorization.

15242725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609719 (or 609714 counting only the distinct ones).

The product of its digits is 5600, while the sum is 28.

The square root of 15242725 is about 3904.1932585363. The cubic root of 15242725 is about 247.9443434330.

Adding to 15242725 its reverse (52724251), we get a palindrome (67966976).

The spelling of 15242725 in words is "fifteen million, two hundred forty-two thousand, seven hundred twenty-five".