1002591 has 16 divisors (see below), whose sum is σ = 1509120. Its totient is φ = 657720.

The previous prime is 1002583. The next prime is 1002619. The reversal of 1002591 is 1952001.

It is not a de Polignac number, because 1002591 - 2³ = 1002583 is a prime.

It is a super-3 number, since 3×1002591³ = 3023379471711333213, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1656 + ... + 2178.

It is an arithmetic number, because the mean of its divisors is an integer number (94320).

2^1002591 is an apocalyptic number.

1002591 is a deficient number, since it is larger than the sum of its proper divisors (506529).

1002591 is an equidigital number, since it uses as much as digits as its factorization.

1002591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 1002591 is about 1001.2946619252. The cubic root of 1002591 is about 100.0862921818.

Adding to 1002591 its reverse (1952001), we get a palindrome (2954592).

The spelling of 1002591 in words is "one million, two thousand, five hundred ninety-one".