18287241 has 24 divisors (see below), whose sum is σ = 29286144. Its totient is φ = 10110240.

The previous prime is 18287221. The next prime is 18287249. The reversal of 18287241 is 14278281.

It is a happy number.

It is not a de Polignac number, because 18287241 - 2⁵ = 18287209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18287249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2551 + ... + 6563.

It is an arithmetic number, because the mean of its divisors is an integer number (1220256).

Almost surely, 2^18287241 is an apocalyptic number.

It is an amenable number.

18287241 is a deficient number, since it is larger than the sum of its proper divisors (10998903).

18287241 is a wasteful number, since it uses less digits than its factorization.

18287241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4061 (or 4054 counting only the distinct ones).

The product of its digits is 7168, while the sum is 33.

The square root of 18287241 is about 4276.3583806786. The cubic root of 18287241 is about 263.4608343024.

It can be divided in two parts, 18287 and 241, that added together give a triangular number (18528 = T₁₉₂).

The spelling of 18287241 in words is "eighteen million, two hundred eighty-seven thousand, two hundred forty-one".