249882481 has 4 divisors (see below), whose sum is σ = 250955172. Its totient is φ = 248809792.

The previous prime is 249882469. The next prime is 249882487. The reversal of 249882481 is 184288942.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29062881 + 220819600 = 5391^2 + 14860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249882481 is a prime.

It is a super-2 number, since 2×249882481² = 124882508621430722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249882487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535996 + ... + 536461.

It is an arithmetic number, because the mean of its divisors is an integer number (62738793).

Almost surely, 2^249882481 is an apocalyptic number.

It is an amenable number.

249882481 is a deficient number, since it is larger than the sum of its proper divisors (1072691).

249882481 is a wasteful number, since it uses less digits than its factorization.

249882481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072690.

The product of its digits is 294912, while the sum is 46.

The square root of 249882481 is about 15807.6715869226. The cubic root of 249882481 is about 629.8617997018.

The spelling of 249882481 in words is "two hundred forty-nine million, eight hundred eighty-two thousand, four hundred eighty-one".