1123421165 has 8 divisors (see below), whose sum is σ = 1352414328. Its totient is φ = 895864320.

The previous prime is 1123421147. The next prime is 1123421171. The reversal of 1123421165 is 5611243211.

It can be written as a sum of positive squares in 4 ways, for example, as 769129 + 1122652036 = 877^2 + 33506^2 .

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

It is not a de Polignac number, because 1123421165 - 2²⁴ = 1106643949 is a prime.

It is a super-2 number, since 2×1123421165² = 2524150227939914450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 357356 + ... + 360485.

It is an arithmetic number, because the mean of its divisors is an integer number (169051791).

Almost surely, 2^1123421165 is an apocalyptic number.

It is an amenable number.

1123421165 is a deficient number, since it is larger than the sum of its proper divisors (228993163).

1123421165 is an equidigital number, since it uses as much as digits as its factorization.

1123421165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718159.

The product of its digits is 1440, while the sum is 26.

The square root of 1123421165 is about 33517.4755165123. The cubic root of 1123421165 is about 1039.5551490581. Note that the first 3 decimals are identical.

Adding to 1123421165 its reverse (5611243211), we get a palindrome (6734664376).

The spelling of 1123421165 in words is "one billion, one hundred twenty-three million, four hundred twenty-one thousand, one hundred sixty-five".