15801243 has 8 divisors (see below), whose sum is σ = 21162048. Its totient is φ = 10487304.

The previous prime is 15801223. The next prime is 15801271. The reversal of 15801243 is 34210851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-15801243 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (15801223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10921 + ... + 12282.

It is an arithmetic number, because the mean of its divisors is an integer number (2645256).

Almost surely, 2^15801243 is an apocalyptic number.

15801243 is a deficient number, since it is larger than the sum of its proper divisors (5360805).

15801243 is a wasteful number, since it uses less digits than its factorization.

15801243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23433.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 15801243 is about 3975.0777350890. The cubic root of 15801243 is about 250.9364505285.

The spelling of 15801243 in words is "fifteen million, eight hundred one thousand, two hundred forty-three".