1123451145 has 24 divisors (see below), whose sum is σ = 1949894856. Its totient is φ = 598380288.

The previous prime is 1123451141. The next prime is 1123451149. The reversal of 1123451145 is 5411543211.

1123451145 is a `hidden beast` number, since 112 + 34 + 511 + 4 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1123451141) and next prime (1123451149).

It can be written as a sum of positive squares in 4 ways, for example, as 139499721 + 983951424 = 11811^2 + 31368^2 .

It is not a de Polignac number, because 1123451145 - 2² = 1123451141 is a prime.

It is a super-2 number, since 2×1123451145² = 2524284950403622050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1123451141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18637 + ... + 50933.

It is an arithmetic number, because the mean of its divisors is an integer number (81245619).

Almost surely, 2^1123451145 is an apocalyptic number.

1123451145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1123451145 is a deficient number, since it is larger than the sum of its proper divisors (826443711).

1123451145 is a wasteful number, since it uses less digits than its factorization.

1123451145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33081 (or 33078 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 1123451145 is about 33517.9227429147. The cubic root of 1123451145 is about 1039.5643962835.

Adding to 1123451145 its reverse (5411543211), we get a palindrome (6534994356).

The spelling of 1123451145 in words is "one billion, one hundred twenty-three million, four hundred fifty-one thousand, one hundred forty-five".