249042113 has 4 divisors (see below), whose sum is σ = 249941460. Its totient is φ = 248142768.

The previous prime is 249042109. The next prime is 249042121. The reversal of 249042113 is 311240942.

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 72471169 + 176570944 = 8513^2 + 13288^2 .

It is a cyclic number.

It is not a de Polignac number, because 249042113 - 2² = 249042109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249042173) 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, 449258 + ... + 449811.

It is an arithmetic number, because the mean of its divisors is an integer number (62485365).

Almost surely, 2^249042113 is an apocalyptic number.

It is an amenable number.

249042113 is a deficient number, since it is larger than the sum of its proper divisors (899347).

249042113 is an equidigital number, since it uses as much as digits as its factorization.

249042113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899346.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 249042113 is about 15781.0681831111. The cubic root of 249042113 is about 629.1549205025.

It can be divided in two parts, 24 and 9042113, that multiplied together give a palindrome (217010712).

The spelling of 249042113 in words is "two hundred forty-nine million, forty-two thousand, one hundred thirteen".