1002681 has 6 divisors (see below), whose sum is σ = 1448330. Its totient is φ = 668448.

The previous prime is 1002679. The next prime is 1002709. The reversal of 1002681 is 1862001.

It can be written as a sum of positive squares in only one way, i.e., 826281 + 176400 = 909^2 + 420^2 .

It is not a de Polignac number, because 1002681 - 2¹ = 1002679 is a prime.

It is a super-2 number, since 2×1002681² = 2010738375522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55696 + ... + 55713.

2^1002681 is an apocalyptic number.

It is an amenable number.

1002681 is a deficient number, since it is larger than the sum of its proper divisors (445649).

1002681 is a wasteful number, since it uses less digits than its factorization.

1002681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111415 (or 111412 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1002681 is about 1001.3396027323. The cubic root of 1002681 is about 100.0892869214.

Adding to 1002681 its reverse (1862001), we get a palindrome (2864682).

The spelling of 1002681 in words is "one million, two thousand, six hundred eighty-one".