249105271 has 2 divisors, whose sum is σ = 249105272. Its totient is φ = 249105270.

The previous prime is 249105253. The next prime is 249105313. The reversal of 249105271 is 172501942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249105271 - 2¹⁷ = 248974199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249105211) 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 as a sum of consecutive naturals, namely, 124552635 + 124552636.

It is an arithmetic number, because the mean of its divisors is an integer number (124552636).

Almost surely, 2^249105271 is an apocalyptic number.

249105271 is a deficient number, since it is larger than the sum of its proper divisors (1).

249105271 is an equidigital number, since it uses as much as digits as its factorization.

249105271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 249105271 is about 15783.0691248565. The cubic root of 249105271 is about 629.2081013446.

The spelling of 249105271 in words is "two hundred forty-nine million, one hundred five thousand, two hundred seventy-one".