1070921 has 2 divisors, whose sum is σ = 1070922. Its totient is φ = 1070920.

The previous prime is 1070899. The next prime is 1070933. The reversal of 1070921 is 1290701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 855625 + 215296 = 925^2 + 464^2 .

It is a cyclic number.

It is not a de Polignac number, because 1070921 - 2¹⁸ = 808777 is a prime.

It is a super-2 number, since 2×1070921² = 2293743576482, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1070893 and 1070902.

It is not a weakly prime, because it can be changed into another prime (1070981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535460 + 535461.

It is an arithmetic number, because the mean of its divisors is an integer number (535461).

2^1070921 is an apocalyptic number.

It is an amenable number.

1070921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1070921 is an equidigital number, since it uses as much as digits as its factorization.

1070921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 1070921 is about 1034.8531296759. The cubic root of 1070921 is about 102.3102497799.

It can be divided in two parts, 1070 and 921, that added together give a palindrome (1991).

The spelling of 1070921 in words is "one million, seventy thousand, nine hundred twenty-one".