248975021 has 2 divisors, whose sum is σ = 248975022. Its totient is φ = 248975020.

The previous prime is 248975003. The next prime is 248975033. The reversal of 248975021 is 120579842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224670121 + 24304900 = 14989^2 + 4930^2 .

It is a cyclic number.

It is not a de Polignac number, because 248975021 - 2²² = 244780717 is a prime.

It is a super-2 number, since 2×248975021² = 123977122163900882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248975071) 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, 124487510 + 124487511.

It is an arithmetic number, because the mean of its divisors is an integer number (124487511).

Almost surely, 2^248975021 is an apocalyptic number.

It is an amenable number.

248975021 is a deficient number, since it is larger than the sum of its proper divisors (1).

248975021 is an equidigital number, since it uses as much as digits as its factorization.

248975021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 248975021 is about 15778.9423283058. The cubic root of 248975021 is about 629.0984172702.

The spelling of 248975021 in words is "two hundred forty-eight million, nine hundred seventy-five thousand, twenty-one".