250243421 has 2 divisors, whose sum is σ = 250243422. Its totient is φ = 250243420.

The previous prime is 250243403. The next prime is 250243453. The reversal of 250243421 is 124342052.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138180025 + 112063396 = 11755^2 + 10586^2 .

It is a cyclic number.

It is not a de Polignac number, because 250243421 - 2²² = 246049117 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 (250245421) 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, 125121710 + 125121711.

It is an arithmetic number, because the mean of its divisors is an integer number (125121711).

Almost surely, 2^250243421 is an apocalyptic number.

It is an amenable number.

250243421 is a deficient number, since it is larger than the sum of its proper divisors (1).

250243421 is an equidigital number, since it uses as much as digits as its factorization.

250243421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 250243421 is about 15819.0840758876. The cubic root of 250243421 is about 630.1649194512.

Adding to 250243421 its reverse (124342052), we get a palindrome (374585473).

The spelling of 250243421 in words is "two hundred fifty million, two hundred forty-three thousand, four hundred twenty-one".