1123272401 has 2 divisors, whose sum is σ = 1123272402. Its totient is φ = 1123272400.

The previous prime is 1123272391. The next prime is 1123272431. The reversal of 1123272401 is 1042723211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 720868801 + 402403600 = 26849^2 + 20060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123272401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1123272431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561636200 + 561636201.

It is an arithmetic number, because the mean of its divisors is an integer number (561636201).

Almost surely, 2^1123272401 is an apocalyptic number.

It is an amenable number.

1123272401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123272401 is an equidigital number, since it uses as much as digits as its factorization.

1123272401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1123272401 is about 33515.2562424935. The cubic root of 1123272401 is about 1039.5092608927.

Adding to 1123272401 its reverse (1042723211), we get a palindrome (2165995612).

The spelling of 1123272401 in words is "one billion, one hundred twenty-three million, two hundred seventy-two thousand, four hundred one".