250424021 has 4 divisors (see below), whose sum is σ = 250615200. Its totient is φ = 250232844.

The previous prime is 250424011. The next prime is 250424033. The reversal of 250424021 is 120424052.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-250424021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 250423984 and 250424002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250424011) 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 in 3 ways as a sum of consecutive naturals, for example, 93611 + ... + 96248.

It is an arithmetic number, because the mean of its divisors is an integer number (62653800).

Almost surely, 2^250424021 is an apocalyptic number.

It is an amenable number.

250424021 is a deficient number, since it is larger than the sum of its proper divisors (191179).

250424021 is a wasteful number, since it uses less digits than its factorization.

250424021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191178.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 250424021 is about 15824.7913414364. The cubic root of 250424021 is about 630.3164791028.

Adding to 250424021 its reverse (120424052), we get a palindrome (370848073).

The spelling of 250424021 in words is "two hundred fifty million, four hundred twenty-four thousand, twenty-one".