649042 has 8 divisors (see below), whose sum is σ = 996336. Its totient is φ = 316932.

The previous prime is 649039. The next prime is 649063. The reversal of 649042 is 240946.

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 = 648998 and 649016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3688 + ... + 3859.

It is an arithmetic number, because the mean of its divisors is an integer number (124542).

2⁶⁴⁹⁰⁴² is an apocalyptic number.

649042 is a deficient number, since it is larger than the sum of its proper divisors (347294).

649042 is a wasteful number, since it uses less digits than its factorization.

649042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7592.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 649042 is about 805.6314293770. The cubic root of 649042 is about 86.5813328371.

Adding to 649042 its reverse (240946), we get a palindrome (889988).

The spelling of 649042 in words is "six hundred forty-nine thousand, forty-two".