250643642 has 4 divisors (see below), whose sum is σ = 375965466. Its totient is φ = 125321820.

The previous prime is 250643629. The next prime is 250643651. The reversal of 250643642 is 246346052.

250643642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 247716121 + 2927521 = 15739^2 + 1711^2 .

It is a junction number, because it is equal to n+sod(n) for n = 250643599 and 250643608.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62660909 + ... + 62660912.

Almost surely, 2^250643642 is an apocalyptic number.

250643642 is a deficient number, since it is larger than the sum of its proper divisors (125321824).

250643642 is a wasteful number, since it uses less digits than its factorization.

250643642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125321823.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 250643642 is about 15831.7289643298. The cubic root of 250643642 is about 630.5006870539.

Adding to 250643642 its reverse (246346052), we get a palindrome (496989694).

The spelling of 250643642 in words is "two hundred fifty million, six hundred forty-three thousand, six hundred forty-two".