1013021 has 4 divisors (see below), whose sum is σ = 1026972. Its totient is φ = 999072.

The previous prime is 1013009. The next prime is 1013029. The reversal of 1013021 is 1203101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 290521 + 722500 = 539^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013021 - 2¹⁴ = 996637 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 (1013029) 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 3 ways as a sum of consecutive naturals, for example, 6866 + ... + 7011.

It is an arithmetic number, because the mean of its divisors is an integer number (256743).

2^1013021 is an apocalyptic number.

It is an amenable number.

1013021 is a deficient number, since it is larger than the sum of its proper divisors (13951).

1013021 is an equidigital number, since it uses as much as digits as its factorization.

1013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13950.

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

The square root of 1013021 is about 1006.4894435611. The cubic root of 1013021 is about 100.4321629944.

Adding to 1013021 its reverse (1203101), we get a palindrome (2216122).

It can be divided in two parts, 10 and 13021, that added together give a palindrome (13031).

The spelling of 1013021 in words is "one million, thirteen thousand, twenty-one".