1136421161 has 4 divisors (see below), whose sum is σ = 1138085712. Its totient is φ = 1134756612.

The previous prime is 1136421137. The next prime is 1136421193. The reversal of 1136421161 is 1611246311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1611246311 = 11003 ⋅146437.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1136421161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1136421161.

It is not an unprimeable number, because it can be changed into a prime (1136421061) 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, 831251 + ... + 832616.

It is an arithmetic number, because the mean of its divisors is an integer number (284521428).

Almost surely, 2^1136421161 is an apocalyptic number.

It is an amenable number.

1136421161 is a deficient number, since it is larger than the sum of its proper divisors (1664551).

1136421161 is an equidigital number, since it uses as much as digits as its factorization.

1136421161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664550.

The product of its digits is 864, while the sum is 26.

The square root of 1136421161 is about 33710.8463406068. The cubic root of 1136421161 is about 1043.5496193623.

Adding to 1136421161 its reverse (1611246311), we get a palindrome (2747667472).

The spelling of 1136421161 in words is "one billion, one hundred thirty-six million, four hundred twenty-one thousand, one hundred sixty-one".