1000634 has 4 divisors (see below), whose sum is σ = 1500954. Its totient is φ = 500316.

The previous prime is 1000621. The next prime is 1000639. The reversal of 1000634 is 4360001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 990025 + 10609 = 995^2 + 103^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1000639) by changing a digit.

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 as a sum of consecutive naturals, namely, 250157 + ... + 250160.

2^1000634 is an apocalyptic number.

1000634 is a deficient number, since it is larger than the sum of its proper divisors (500320).

1000634 is an equidigital number, since it uses as much as digits as its factorization.

1000634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500319.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1000634 is about 1000.3169497714. The cubic root of 1000634 is about 100.0211288687.

Adding to 1000634 its reverse (4360001), we get a palindrome (5360635).

The spelling of 1000634 in words is "one million, six hundred thirty-four", and thus it is an aban number.