1145891745 has 16 divisors (see below), whose sum is σ = 2037141120. Its totient is φ = 611142192.

The previous prime is 1145891743. The next prime is 1145891777. The reversal of 1145891745 is 5471985411.

1145891745 is a `hidden beast` number, since 1 + 14 + 589 + 17 + 45 = 666.

It is not a de Polignac number, because 1145891745 - 2¹ = 1145891743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1145891745.

It is not an unprimeable number, because it can be changed into a prime (1145891743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4243909 + ... + 4244178.

It is an arithmetic number, because the mean of its divisors is an integer number (127321320).

Almost surely, 2^1145891745 is an apocalyptic number.

1145891745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1145891745 is a deficient number, since it is larger than the sum of its proper divisors (891249375).

1145891745 is an equidigital number, since it uses as much as digits as its factorization.

1145891745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8488101 (or 8488095 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 1145891745 is about 33851.0228058178. The cubic root of 1145891745 is about 1046.4404773896.

The spelling of 1145891745 in words is "one billion, one hundred forty-five million, eight hundred ninety-one thousand, seven hundred forty-five".