649125842 has 8 divisors (see below), whose sum is σ = 1024935600. Its totient is φ = 307480644.

The previous prime is 649125809. The next prime is 649125863. The reversal of 649125842 is 248521946.

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 649125842.

It is an unprimeable number.

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, 8541092 + ... + 8541167.

It is an arithmetic number, because the mean of its divisors is an integer number (128116950).

Almost surely, 2^649125842 is an apocalyptic number.

649125842 is a deficient number, since it is larger than the sum of its proper divisors (375809758).

649125842 is a wasteful number, since it uses less digits than its factorization.

649125842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17082280.

The product of its digits is 138240, while the sum is 41.

The square root of 649125842 is about 25477.9481512935. The cubic root of 649125842 is about 865.8506081341.

The spelling of 649125842 in words is "six hundred forty-nine million, one hundred twenty-five thousand, eight hundred forty-two".