18041249 has 2 divisors, whose sum is σ = 18041250. Its totient is φ = 18041248.

The previous prime is 18041173. The next prime is 18041251. The reversal of 18041249 is 94214081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10923025 + 7118224 = 3305^2 + 2668^2 .

It is a cyclic number.

It is not a de Polignac number, because 18041249 - 2²⁴ = 1264033 is a prime.

It is a Sophie Germain prime.

Together with 18041251, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18041449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9020624 + 9020625.

It is an arithmetic number, because the mean of its divisors is an integer number (9020625).

Almost surely, 2^18041249 is an apocalyptic number.

It is an amenable number.

18041249 is a deficient number, since it is larger than the sum of its proper divisors (1).

18041249 is an equidigital number, since it uses as much as digits as its factorization.

18041249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 18041249 is about 4247.4991465567. The cubic root of 18041249 is about 262.2741773655.

The spelling of 18041249 in words is "eighteen million, forty-one thousand, two hundred forty-nine".