1123082261 has 4 divisors (see below), whose sum is σ = 1283522592. Its totient is φ = 962641932.

The previous prime is 1123082231. The next prime is 1123082269. The reversal of 1123082261 is 1622803211.

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.

It is not a de Polignac number, because 1123082261 - 2⁶ = 1123082197 is a prime.

It is a super-2 number, since 2×1123082261² = 2522627529945744242, which contains 22 as substring.

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 1123082261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123082269) 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, 80220155 + ... + 80220168.

It is an arithmetic number, because the mean of its divisors is an integer number (320880648).

Almost surely, 2^1123082261 is an apocalyptic number.

It is an amenable number.

1123082261 is a deficient number, since it is larger than the sum of its proper divisors (160440331).

1123082261 is an equidigital number, since it uses as much as digits as its factorization.

1123082261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160440330.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1123082261 is about 33512.4195038198. The cubic root of 1123082261 is about 1039.4506038699.

Adding to 1123082261 its reverse (1622803211), we get a palindrome (2745885472).

The spelling of 1123082261 in words is "one billion, one hundred twenty-three million, eighty-two thousand, two hundred sixty-one".