1135921 has 2 divisors, whose sum is σ = 1135922. Its totient is φ = 1135920.

The previous prime is 1135919. The next prime is 1135951. The reversal of 1135921 is 1295311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1123600 + 12321 = 1060^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 1135921 - 2¹ = 1135919 is a prime.

Together with 1135919, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1135892 and 1135901.

It is not a weakly prime, because it can be changed into another prime (1135951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 567960 + 567961.

It is an arithmetic number, because the mean of its divisors is an integer number (567961).

2^1135921 is an apocalyptic number.

It is an amenable number.

1135921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1135921 is an equidigital number, since it uses as much as digits as its factorization.

1135921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 22.

The square root of 1135921 is about 1065.7959466990. The cubic root of 1135921 is about 104.3396501419.

The spelling of 1135921 in words is "one million, one hundred thirty-five thousand, nine hundred twenty-one".