15242889 has 4 divisors (see below), whose sum is σ = 20323856. Its totient is φ = 10161924.

The previous prime is 15242873. The next prime is 15242891. The reversal of 15242889 is 98824251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98824251 = 3 ⋅32941417.

It is not a de Polignac number, because 15242889 - 2⁴ = 15242873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15242809) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2540479 + ... + 2540484.

It is an arithmetic number, because the mean of its divisors is an integer number (5080964).

Almost surely, 2^15242889 is an apocalyptic number.

It is an amenable number.

15242889 is a deficient number, since it is larger than the sum of its proper divisors (5080967).

15242889 is an equidigital number, since it uses as much as digits as its factorization.

15242889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5080966.

The product of its digits is 46080, while the sum is 39.

The square root of 15242889 is about 3904.2142615384. The cubic root of 15242889 is about 247.9452326600.

The spelling of 15242889 in words is "fifteen million, two hundred forty-two thousand, eight hundred eighty-nine".