250525421 has 2 divisors, whose sum is σ = 250525422. Its totient is φ = 250525420.

The previous prime is 250525411. The next prime is 250525423. The reversal of 250525421 is 124525052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158634025 + 91891396 = 12595^2 + 9586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-250525421 is a prime.

Together with 250525423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250525423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125262710 + 125262711.

It is an arithmetic number, because the mean of its divisors is an integer number (125262711).

Almost surely, 2^250525421 is an apocalyptic number.

It is an amenable number.

250525421 is a deficient number, since it is larger than the sum of its proper divisors (1).

250525421 is an equidigital number, since it uses as much as digits as its factorization.

250525421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 250525421 is about 15827.9948508963. The cubic root of 250525421 is about 630.4015421173.

The spelling of 250525421 in words is "two hundred fifty million, five hundred twenty-five thousand, four hundred twenty-one".