1004990 has 32 divisors (see below), whose sum is σ = 2116800. Its totient is φ = 343392.

The previous prime is 1004987. The next prime is 1005007. The reversal of 1004990 is 994001.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3284 + ... + 3576.

It is an arithmetic number, because the mean of its divisors is an integer number (66150).

2^1004990 is an apocalyptic number.

1004990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1004990 is an abundant number, since it is smaller than the sum of its proper divisors (1111810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1004990 is an equidigital number, since it uses as much as digits as its factorization.

1004990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1004990 is about 1002.4918952291. The cubic root of 1004990 is about 100.1660574300.

Adding to 1004990 its reverse (994001), we get a palindrome (1998991).

The spelling of 1004990 in words is "one million, four thousand, nine hundred ninety".