1021313 has 4 divisors (see below), whose sum is σ = 1031940. Its totient is φ = 1010688.

The previous prime is 1021303. The next prime is 1021327. The reversal of 1021313 is 3131201.

1021313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3131201 = 523 ⋅5987.

It can be written as a sum of positive squares in 2 ways, for example, as 652864 + 368449 = 808^2 + 607^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021313 - 2⁴ = 1021297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1021294 and 1021303.

It is not an unprimeable number, because it can be changed into a prime (1021303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5168 + ... + 5361.

It is an arithmetic number, because the mean of its divisors is an integer number (257985).

2^1021313 is an apocalyptic number.

It is an amenable number.

1021313 is a deficient number, since it is larger than the sum of its proper divisors (10627).

1021313 is an equidigital number, since it uses as much as digits as its factorization.

1021313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10626.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1021313 is about 1010.6003166435. The cubic root of 1021313 is about 100.7054451032.

Adding to 1021313 its reverse (3131201), we get a palindrome (4152514).

The spelling of 1021313 in words is "one million, twenty-one thousand, three hundred thirteen".