642622130 has 8 divisors (see below), whose sum is σ = 1156719852. Its totient is φ = 257048848.

The previous prime is 642622109. The next prime is 642622163. The reversal of 642622130 is 31226246.

It can be written as a sum of positive squares in 2 ways, for example, as 640747969 + 1874161 = 25313^2 + 1369^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 642622130.

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, 32131097 + ... + 32131116.

Almost surely, 2^642622130 is an apocalyptic number.

642622130 is a deficient number, since it is larger than the sum of its proper divisors (514097722).

642622130 is a wasteful number, since it uses less digits than its factorization.

642622130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64262220.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 642622130 is about 25349.9927021686. The cubic root of 642622130 is about 862.9491906512.

Adding to 642622130 its reverse (31226246), we get a palindrome (673848376).

The spelling of 642622130 in words is "six hundred forty-two million, six hundred twenty-two thousand, one hundred thirty".