15252442 has 4 divisors (see below), whose sum is σ = 22878666. Its totient is φ = 7626220.

The previous prime is 15252439. The next prime is 15252449. The reversal of 15252442 is 24425251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24425251 = 2239 ⋅10909.

It can be written as a sum of positive squares in only one way, i.e., 11296321 + 3956121 = 3361^2 + 1989^2 .

It is not an unprimeable number, because it can be changed into a prime (15252449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3813109 + ... + 3813112.

Almost surely, 2^15252442 is an apocalyptic number.

15252442 is a deficient number, since it is larger than the sum of its proper divisors (7626224).

15252442 is an equidigital number, since it uses as much as digits as its factorization.

15252442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7626223.

The product of its digits is 3200, while the sum is 25.

The square root of 15252442 is about 3905.4374914982. The cubic root of 15252442 is about 247.9970191282.

Adding to 15252442 its reverse (24425251), we get a palindrome (39677693).

The spelling of 15252442 in words is "fifteen million, two hundred fifty-two thousand, four hundred forty-two".