1136511421 has 12 divisors (see below), whose sum is σ = 1246306932. Its totient is φ = 1032760064.

The previous prime is 1136511361. The next prime is 1136511427. The reversal of 1136511421 is 1241156311.

It can be written as a sum of positive squares in 6 ways, for example, as 170172025 + 966339396 = 13045^2 + 31086^2 .

It is not a de Polignac number, because 1136511421 - 2⁷ = 1136511293 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 (1136511427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25450 + ... + 54043.

It is an arithmetic number, because the mean of its divisors is an integer number (103858911).

Almost surely, 2^1136511421 is an apocalyptic number.

It is an amenable number.

1136511421 is a deficient number, since it is larger than the sum of its proper divisors (109795511).

1136511421 is an equidigital number, since it uses as much as digits as its factorization.

1136511421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79568 (or 79539 counting only the distinct ones).

The product of its digits is 720, while the sum is 25.

The square root of 1136511421 is about 33712.1850522923. The cubic root of 1136511421 is about 1043.5772465304.

Adding to 1136511421 its reverse (1241156311), we get a palindrome (2377667732).

The spelling of 1136511421 in words is "one billion, one hundred thirty-six million, five hundred eleven thousand, four hundred twenty-one".