250149721 has 2 divisors, whose sum is σ = 250149722. Its totient is φ = 250149720.

The previous prime is 250149709. The next prime is 250149749. The reversal of 250149721 is 127941052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247716121 + 2433600 = 15739^2 + 1560^2 .

It is a cyclic number.

It is not a de Polignac number, because 250149721 - 2⁵ = 250149689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (250149701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125074860 + 125074861.

It is an arithmetic number, because the mean of its divisors is an integer number (125074861).

Almost surely, 2^250149721 is an apocalyptic number.

It is an amenable number.

250149721 is a deficient number, since it is larger than the sum of its proper divisors (1).

250149721 is an equidigital number, since it uses as much as digits as its factorization.

250149721 is an evil number, because the sum of its binary digits is even.

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

The square root of 250149721 is about 15816.1221859216. The cubic root of 250149721 is about 630.0862576107.

The spelling of 250149721 in words is "two hundred fifty million, one hundred forty-nine thousand, seven hundred twenty-one".