1145123225 has 6 divisors (see below), whose sum is σ = 1419952830. Its totient is φ = 916098560.

The previous prime is 1145123219. The next prime is 1145123227. The reversal of 1145123225 is 5223215411.

It can be written as a sum of positive squares in 3 ways, for example, as 14280841 + 1130842384 = 3779^2 + 33628^2 .

It is not a de Polignac number, because 1145123225 - 2⁸ = 1145122969 is a prime.

It is a super-2 number, since 2×1145123225² = 2622614400868801250, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1145123194 and 1145123203.

It is not an unprimeable number, because it can be changed into a prime (1145123227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22902440 + ... + 22902489.

It is an arithmetic number, because the mean of its divisors is an integer number (236658805).

Almost surely, 2^1145123225 is an apocalyptic number.

It is an amenable number.

1145123225 is a deficient number, since it is larger than the sum of its proper divisors (274829605).

1145123225 is an equidigital number, since it uses as much as digits as its factorization.

1145123225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45804939 (or 45804934 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 1145123225 is about 33839.6693985033. The cubic root of 1145123225 is about 1046.2064848698.

Adding to 1145123225 its reverse (5223215411), we get a palindrome (6368338636).

The spelling of 1145123225 in words is "one billion, one hundred forty-five million, one hundred twenty-three thousand, two hundred twenty-five".