1135504021 has 4 divisors (see below), whose sum is σ = 1135612044. Its totient is φ = 1135396000.

The previous prime is 1135503983. The next prime is 1135504031. The reversal of 1135504021 is 1204055311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 952956900 + 182547121 = 30870^2 + 13511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1135504021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1135503983 and 1135504001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135504031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36310 + ... + 59911.

It is an arithmetic number, because the mean of its divisors is an integer number (283903011).

Almost surely, 2^1135504021 is an apocalyptic number.

It is an amenable number.

1135504021 is a deficient number, since it is larger than the sum of its proper divisors (108023).

1135504021 is an equidigital number, since it uses as much as digits as its factorization.

1135504021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108022.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1135504021 is about 33697.2405546804. The cubic root of 1135504021 is about 1043.2688142305.

Adding to 1135504021 its reverse (1204055311), we get a palindrome (2339559332).

The spelling of 1135504021 in words is "one billion, one hundred thirty-five million, five hundred four thousand, twenty-one".