1070021 has 2 divisors, whose sum is σ = 1070022. Its totient is φ = 1070020.

The previous prime is 1070011. The next prime is 1070033. The reversal of 1070021 is 1200701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 829921 + 240100 = 911^2 + 490^2 .

It is an emirp because it is prime and its reverse (1200701) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1070021 is a prime.

It is a super-2 number, since 2×1070021² = 2289889880882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1069984 and 1070011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1070011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535010 + 535011.

It is an arithmetic number, because the mean of its divisors is an integer number (535011).

2^1070021 is an apocalyptic number.

It is an amenable number.

1070021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1070021 is an equidigital number, since it uses as much as digits as its factorization.

1070021 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1070021 is about 1034.4181939622. The cubic root of 1070021 is about 102.2815813001.

Adding to 1070021 its reverse (1200701), we get a palindrome (2270722).

The spelling of 1070021 in words is "one million, seventy thousand, twenty-one".