1021013 has 12 divisors (see below), whose sum is σ = 1209312. Its totient is φ = 859320.

The previous prime is 1021001. The next prime is 1021019. The reversal of 1021013 is 3101201.

It is not a de Polignac number, because 1021013 - 2⁴ = 1020997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3128 + ... + 3438.

It is an arithmetic number, because the mean of its divisors is an integer number (100776).

2^1021013 is an apocalyptic number.

It is an amenable number.

1021013 is a deficient number, since it is larger than the sum of its proper divisors (188299).

1021013 is an equidigital number, since it uses as much as digits as its factorization.

1021013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 1021013 is about 1010.4518791115. The cubic root of 1021013 is about 100.6955837475.

Adding to 1021013 its reverse (3101201), we get a palindrome (4122214).

The spelling of 1021013 in words is "one million, twenty-one thousand, thirteen".