1002981 has 12 divisors (see below), whose sum is σ = 1555872. Its totient is φ = 573048.

The previous prime is 1002979. The next prime is 1003001. The reversal of 1002981 is 1892001.

1002981 is nontrivially palindromic in base 6.

It is not a de Polignac number, because 1002981 - 2¹ = 1002979 is a prime.

It is a super-2 number, since 2×1002981² = 2011941772722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

1002981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002931) 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 11 ways as a sum of consecutive naturals, for example, 3265 + ... + 3558.

It is an arithmetic number, because the mean of its divisors is an integer number (129656).

2^1002981 is an apocalyptic number.

It is an amenable number.

1002981 is a deficient number, since it is larger than the sum of its proper divisors (552891).

1002981 is an equidigital number, since it uses as much as digits as its factorization.

1002981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6840 (or 6833 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1002981 is about 1001.4893908574. The cubic root of 1002981 is about 100.0992680925.

Adding to 1002981 its reverse (1892001), we get a palindrome (2894982).

It can be divided in two parts, 100 and 2981, that added together give a triangular number (3081 = T₇₈).

The spelling of 1002981 in words is "one million, two thousand, nine hundred eighty-one".