649942 has 8 divisors (see below), whose sum is σ = 1001376. Its totient is φ = 316152.

The previous prime is 649937. The next prime is 649969. The reversal of 649942 is 249946.

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

It is a d-powerful number, because it can be written as 6² + 4⁵ + 9 + 9⁵ + 4⁸ + 2¹⁹ .

It is a junction number, because it is equal to n+sod(n) for n = 649898 and 649907.

It is a congruent number.

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, 4318 + ... + 4465.

It is an arithmetic number, because the mean of its divisors is an integer number (125172).

2⁶⁴⁹⁹⁴² is an apocalyptic number.

649942 is a deficient number, since it is larger than the sum of its proper divisors (351434).

649942 is a wasteful number, since it uses less digits than its factorization.

649942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8822.

The product of its digits is 15552, while the sum is 34.

The square root of 649942 is about 806.1898039544. The cubic root of 649942 is about 86.6213339514.

The spelling of 649942 in words is "six hundred forty-nine thousand, nine hundred forty-two".