249999941 has 2 divisors, whose sum is σ = 249999942. Its totient is φ = 249999940.

The previous prime is 249999917. The next prime is 249999991. The reversal of 249999941 is 149999942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187115041 + 62884900 = 13679^2 + 7930^2 .

It is a cyclic number.

It is not a de Polignac number, because 249999941 - 2⁶ = 249999877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249999991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124999970 + 124999971.

It is an arithmetic number, because the mean of its divisors is an integer number (124999971).

Almost surely, 2^249999941 is an apocalyptic number.

It is an amenable number.

249999941 is a deficient number, since it is larger than the sum of its proper divisors (1).

249999941 is an equidigital number, since it uses as much as digits as its factorization.

249999941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 56.

The square root of 249999941 is about 15811.3864350980. The cubic root of 249999941 is about 629.9604753905.

Subtracting from 249999941 its reverse (149999942), we obtain a palindrome (99999999).

The spelling of 249999941 in words is "two hundred forty-nine million, nine hundred ninety-nine thousand, nine hundred forty-one".