1145145552 has 40 divisors (see below), whose sum is σ = 2964378720. Its totient is φ = 380929920.

The previous prime is 1145145511. The next prime is 1145145557. The reversal of 1145145552 is 2555415411.

It is a happy number.

It is a super-2 number, since 2×1145145552² = 2622716670530769408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145145557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727 + ... + 47862.

It is an arithmetic number, because the mean of its divisors is an integer number (74109468).

Almost surely, 2^1145145552 is an apocalyptic number.

1145145552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1145145552 is an abundant number, since it is smaller than the sum of its proper divisors (1819233168).

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

1145145552 is a wasteful number, since it uses less digits than its factorization.

1145145552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49091 (or 49085 counting only the distinct ones).

The product of its digits is 20000, while the sum is 33.

The square root of 1145145552 is about 33839.9992907801. Note that the first 3 decimals coincide. The cubic root of 1145145552 is about 1046.2132842837.

The spelling of 1145145552 in words is "one billion, one hundred forty-five million, one hundred forty-five thousand, five hundred fifty-two".