1145075220 has 72 divisors (see below), whose sum is σ = 3522355200. Its totient is φ = 301049280.

The previous prime is 1145075207. The next prime is 1145075227. The reversal of 1145075220 is 225705411.

It is a super-2 number, since 2×1145075220² = 2622394518916096800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145075227) 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, 32020 + ... + 57579.

It is an arithmetic number, because the mean of its divisors is an integer number (48921600).

Almost surely, 2^1145075220 is an apocalyptic number.

1145075220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145075220 is an abundant number, since it is smaller than the sum of its proper divisors (2377279980).

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

1145075220 is a wasteful number, since it uses less digits than its factorization.

1145075220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89685 (or 89680 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 1145075220 is about 33838.9600904047. The cubic root of 1145075220 is about 1046.1918652367.

The spelling of 1145075220 in words is "one billion, one hundred forty-five million, seventy-five thousand, two hundred twenty".