15128243 has 4 divisors (see below), whose sum is σ = 16291968. Its totient is φ = 13964520.

The previous prime is 15128233. The next prime is 15128251. The reversal of 15128243 is 34282151.

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

It is a cyclic number.

It is not a de Polignac number, because 15128243 - 2¹² = 15124147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15128203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 581843 + ... + 581868.

It is an arithmetic number, because the mean of its divisors is an integer number (4072992).

Almost surely, 2^15128243 is an apocalyptic number.

15128243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

15128243 is a deficient number, since it is larger than the sum of its proper divisors (1163725).

15128243 is a wasteful number, since it uses less digits than its factorization.

15128243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163724.

The product of its digits is 1920, while the sum is 26.

The square root of 15128243 is about 3889.5042100504. The cubic root of 15128243 is about 247.3220460085.

The spelling of 15128243 in words is "fifteen million, one hundred twenty-eight thousand, two hundred forty-three".