646252142 has 8 divisors (see below), whose sum is σ = 969618600. Its totient is φ = 323045944.

The previous prime is 646252097. The next prime is 646252151. The reversal of 646252142 is 241252646.

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

It is a junction number, because it is equal to n+sod(n) for n = 646252099 and 646252108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29417 + ... + 46452.

It is an arithmetic number, because the mean of its divisors is an integer number (121202325).

Almost surely, 2^646252142 is an apocalyptic number.

646252142 is a deficient number, since it is larger than the sum of its proper divisors (323366458).

646252142 is a wasteful number, since it uses less digits than its factorization.

646252142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80130.

The product of its digits is 23040, while the sum is 32.

The square root of 646252142 is about 25421.4897675176. The cubic root of 646252142 is about 864.5710022598.

The spelling of 646252142 in words is "six hundred forty-six million, two hundred fifty-two thousand, one hundred forty-two".