1135721 has 2 divisors, whose sum is σ = 1135722. Its totient is φ = 1135720.

The previous prime is 1135711. The next prime is 1135733. The reversal of 1135721 is 1275311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1125721 + 10000 = 1061^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 1135721 - 2⁶ = 1135657 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1135693 and 1135702.

It is not a weakly prime, because it can be changed into another prime (1135711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 567860 + 567861.

It is an arithmetic number, because the mean of its divisors is an integer number (567861).

2^1135721 is an apocalyptic number.

It is an amenable number.

1135721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1135721 is an equidigital number, since it uses as much as digits as its factorization.

1135721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 210, while the sum is 20.

The square root of 1135721 is about 1065.7021159780. The cubic root of 1135721 is about 104.3335261377. Note that the first 3 decimals are identical.

The spelling of 1135721 in words is "one million, one hundred thirty-five thousand, seven hundred twenty-one".