1135165021 has 8 divisors (see below), whose sum is σ = 1216422144. Its totient is φ = 1055517120.

The previous prime is 1135165001. The next prime is 1135165027. The reversal of 1135165021 is 1205615311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1135165021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135165027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400845 + ... + 403666.

It is an arithmetic number, because the mean of its divisors is an integer number (152052768).

Almost surely, 2^1135165021 is an apocalyptic number.

It is an amenable number.

1135165021 is a deficient number, since it is larger than the sum of its proper divisors (81257123).

1135165021 is an equidigital number, since it uses as much as digits as its factorization.

1135165021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804611.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1135165021 is about 33692.2100937294. The cubic root of 1135165021 is about 1043.1649827094.

The spelling of 1135165021 in words is "one billion, one hundred thirty-five million, one hundred sixty-five thousand, twenty-one".