1000990 has 16 divisors (see below), whose sum is σ = 1860480. Its totient is φ = 387360.

The previous prime is 1000981. The next prime is 1000999. The reversal of 1000990 is 990001.

It is an interprime number because it is at equal distance from previous prime (1000981) and next prime (1000999).

1000990 is a modest number, since divided by 990 gives 100 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000999) 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 in 7 ways as a sum of consecutive naturals, for example, 1305 + ... + 1924.

It is an arithmetic number, because the mean of its divisors is an integer number (116280).

2^1000990 is an apocalyptic number.

1000990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000990 is a deficient number, since it is larger than the sum of its proper divisors (859490).

1000990 is a wasteful number, since it uses less digits than its factorization.

1000990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3267.

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 1000990 is about 1000.4948775481. The cubic root of 1000990 is about 100.0329891160.

Adding to 1000990 its reverse (990001), we get a palindrome (1990991).

The spelling of 1000990 in words is "one million, nine hundred ninety", and thus it is an aban number.