250625021 has 2 divisors, whose sum is σ = 250625022. Its totient is φ = 250625020.

The previous prime is 250624993. The next prime is 250625071. The reversal of 250625021 is 120526052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196308121 + 54316900 = 14011^2 + 7370^2 .

It is a cyclic number.

It is not a de Polignac number, because 250625021 - 2¹⁴ = 250608637 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250625071) 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, 125312510 + 125312511.

It is an arithmetic number, because the mean of its divisors is an integer number (125312511).

Almost surely, 2^250625021 is an apocalyptic number.

It is an amenable number.

250625021 is a deficient number, since it is larger than the sum of its proper divisors (1).

250625021 is an equidigital number, since it uses as much as digits as its factorization.

250625021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 250625021 is about 15831.1408622373. The cubic root of 250625021 is about 630.4850727951.

The spelling of 250625021 in words is "two hundred fifty million, six hundred twenty-five thousand, twenty-one".