1027021 has 4 divisors (see below), whose sum is σ = 1087452. Its totient is φ = 966592.

The previous prime is 1027003. The next prime is 1027027. The reversal of 1027021 is 1207201.

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 855625 + 171396 = 925^2 + 414^2 .

It is a cyclic number.

It is not a de Polignac number, because 1027021 - 2⁵ = 1026989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1026992 and 1027010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1027027) 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, 30190 + ... + 30223.

It is an arithmetic number, because the mean of its divisors is an integer number (271863).

2^1027021 is an apocalyptic number.

It is an amenable number.

1027021 is a deficient number, since it is larger than the sum of its proper divisors (60431).

1027021 is an equidigital number, since it uses as much as digits as its factorization.

1027021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60430.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 1027021 is about 1013.4204458170. The cubic root of 1027021 is about 100.8927070276.

The spelling of 1027021 in words is "one million, twenty-seven thousand, twenty-one".