250245421 has 2 divisors, whose sum is σ = 250245422. Its totient is φ = 250245420.

The previous prime is 250245419. The next prime is 250245439. The reversal of 250245421 is 124542052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154107396 + 96138025 = 12414^2 + 9805^2 .

It is a cyclic number.

It is not a de Polignac number, because 250245421 - 2¹ = 250245419 is a prime.

Together with 250245419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250243421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125122710 + 125122711.

It is an arithmetic number, because the mean of its divisors is an integer number (125122711).

Almost surely, 2^250245421 is an apocalyptic number.

It is an amenable number.

250245421 is a deficient number, since it is larger than the sum of its proper divisors (1).

250245421 is an equidigital number, since it uses as much as digits as its factorization.

250245421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 250245421 is about 15819.1472905464. The cubic root of 250245421 is about 630.1665982518.

Adding to 250245421 its reverse (124542052), we get a palindrome (374787473).

The spelling of 250245421 in words is "two hundred fifty million, two hundred forty-five thousand, four hundred twenty-one".