249138041 has 4 divisors (see below), whose sum is σ = 257174784. Its totient is φ = 241101300.

The previous prime is 249138011. The next prime is 249138083. The reversal of 249138041 is 140831942.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 249138041 - 2¹⁰ = 249137017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249137989 and 249138007.

It is not an unprimeable number, because it can be changed into a prime (249138011) 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, 4018325 + ... + 4018386.

It is an arithmetic number, because the mean of its divisors is an integer number (64293696).

Almost surely, 2^249138041 is an apocalyptic number.

It is an amenable number.

249138041 is a deficient number, since it is larger than the sum of its proper divisors (8036743).

249138041 is an equidigital number, since it uses as much as digits as its factorization.

249138041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8036742.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 249138041 is about 15784.1072284751. The cubic root of 249138041 is about 629.2356910798.

Adding to 249138041 its reverse (140831942), we get a palindrome (389969983).

The spelling of 249138041 in words is "two hundred forty-nine million, one hundred thirty-eight thousand, forty-one".