1020681 has 10 divisors (see below), whose sum is σ = 1524842. Its totient is φ = 680400.

The previous prime is 1020667. The next prime is 1020683. The reversal of 1020681 is 1860201.

1020681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 810000 + 210681 = 900^2 + 459^2 .

It is not a de Polignac number, because 1020681 - 2¹⁰ = 1019657 is a prime.

It is a super-2 number, since 2×1020681² = 2083579407522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1020683) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6220 + ... + 6381.

2^1020681 is an apocalyptic number.

It is an amenable number.

1020681 is a deficient number, since it is larger than the sum of its proper divisors (504161).

1020681 is an equidigital number, since it uses as much as digits as its factorization.

1020681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12613 (or 12604 counting only the distinct ones).

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

The square root of 1020681 is about 1010.2875828199. The cubic root of 1020681 is about 100.6846682620.

Adding to 1020681 its reverse (1860201), we get a palindrome (2880882).

The spelling of 1020681 in words is "one million, twenty thousand, six hundred eighty-one".