250000642 has 8 divisors (see below), whose sum is σ = 376336332. Its totient is φ = 124555200.

The previous prime is 250000633. The next prime is 250000669. The reversal of 250000642 is 246000052.

250000642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 242705241 + 7295401 = 15579^2 + 2701^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221859 + ... + 222982.

Almost surely, 2^250000642 is an apocalyptic number.

250000642 is a deficient number, since it is larger than the sum of its proper divisors (126335690).

250000642 is a wasteful number, since it uses less digits than its factorization.

250000642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445124.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 250000642 is about 15811.4086026514. The cubic root of 250000642 is about 629.9610641932.

Adding to 250000642 its reverse (246000052), we get a palindrome (496000694).

The spelling of 250000642 in words is "two hundred fifty million, six hundred forty-two", and thus it is an aban number.