1145312120 has 16 divisors (see below), whose sum is σ = 2576952360. Its totient is φ = 458124832.

The previous prime is 1145312101. The next prime is 1145312123. The reversal of 1145312120 is 212135411.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1145312092 and 1145312101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145312123) 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 3 ways as a sum of consecutive naturals, for example, 14316362 + ... + 14316441.

Almost surely, 2^1145312120 is an apocalyptic number.

1145312120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145312120 is an abundant number, since it is smaller than the sum of its proper divisors (1431640240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1145312120 is a wasteful number, since it uses less digits than its factorization.

1145312120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28632814 (or 28632810 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1145312120 is about 33842.4603124536. The cubic root of 1145312120 is about 1046.2640077355.

Adding to 1145312120 its reverse (212135411), we get a palindrome (1357447531).

The spelling of 1145312120 in words is "one billion, one hundred forty-five million, three hundred twelve thousand, one hundred twenty".