1000649 has 12 divisors (see below), whose sum is σ = 1124352. Its totient is φ = 889200.

The previous prime is 1000639. The next prime is 1000651. The reversal of 1000649 is 9460001.

1000649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1000649 - 2⁸ = 1000393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1000649.

It is not an unprimeable number, because it can be changed into a prime (1000609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5144 + ... + 5334.

It is an arithmetic number, because the mean of its divisors is an integer number (93696).

2^1000649 is an apocalyptic number.

It is an amenable number.

1000649 is a deficient number, since it is larger than the sum of its proper divisors (123703).

1000649 is a wasteful number, since it uses less digits than its factorization.

1000649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1000649 is about 1000.3244473670. The cubic root of 1000649 is about 100.0216286550.

The spelling of 1000649 in words is "one million, six hundred forty-nine", and thus it is an aban number.