1007021 has 2 divisors, whose sum is σ = 1007022. Its totient is φ = 1007020.

The previous prime is 1006991. The next prime is 1007023. The reversal of 1007021 is 1207001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 978121 + 28900 = 989^2 + 170^2 .

It is an emirp because it is prime and its reverse (1207001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1007021 - 2¹⁴ = 990637 is a prime.

Together with 1007023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1006993 and 1007011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1007023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503510 + 503511.

It is an arithmetic number, because the mean of its divisors is an integer number (503511).

2^1007021 is an apocalyptic number.

It is an amenable number.

1007021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1007021 is an equidigital number, since it uses as much as digits as its factorization.

1007021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14, while the sum is 11.

The square root of 1007021 is about 1003.5043597314. The cubic root of 1007021 is about 100.2334877438.

The spelling of 1007021 in words is "one million, seven thousand, twenty-one".