1008021 has 16 divisors (see below), whose sum is σ = 1603584. Its totient is φ = 550704.

The previous prime is 1008017. The next prime is 1008031. The reversal of 1008021 is 1208001.

It is a happy number.

It is not a de Polignac number, because 1008021 - 2² = 1008017 is a prime.

It is a super-2 number, since 2×1008021² = 2032212672882, which contains 22 as substring.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 1007988 and 1008006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1008001) 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 15 ways as a sum of consecutive naturals, for example, 561 + ... + 1526.

It is an arithmetic number, because the mean of its divisors is an integer number (100224).

2^1008021 is an apocalyptic number.

It is an amenable number.

1008021 is a deficient number, since it is larger than the sum of its proper divisors (595563).

1008021 is a wasteful number, since it uses less digits than its factorization.

1008021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1008021 is about 1004.0024900368. The cubic root of 1008021 is about 100.2666549858.

It can be divided in two parts, 10080 and 21, that added together give a palindrome (10101).

The spelling of 1008021 in words is "one million, eight thousand, twenty-one".