248421757 has 2 divisors, whose sum is σ = 248421758. Its totient is φ = 248421756.

The previous prime is 248421709. The next prime is 248421787. The reversal of 248421757 is 757124842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158911236 + 89510521 = 12606^2 + 9461^2 .

It is a cyclic number.

It is not a de Polignac number, because 248421757 - 2¹⁹ = 247897469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248421787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124210878 + 124210879.

It is an arithmetic number, because the mean of its divisors is an integer number (124210879).

Almost surely, 2^248421757 is an apocalyptic number.

It is an amenable number.

248421757 is a deficient number, since it is larger than the sum of its proper divisors (1).

248421757 is an equidigital number, since it uses as much as digits as its factorization.

248421757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 125440, while the sum is 40.

The square root of 248421757 is about 15761.4008577918. The cubic root of 248421757 is about 628.6320844925.

The spelling of 248421757 in words is "two hundred forty-eight million, four hundred twenty-one thousand, seven hundred fifty-seven".