1187345745 has 12 divisors (see below), whose sum is σ = 2058066036. Its totient is φ = 633251040.

The previous prime is 1187345743. The next prime is 1187345749. The reversal of 1187345745 is 5475437811.

1187345745 is a `hidden beast` number, since 1 + 1 + 8 + 73 + 4 + 574 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 147476736 + 1039869009 = 12144^2 + 32247^2 .

It is not a de Polignac number, because 1187345745 - 2¹ = 1187345743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 26385461 = 1187345745 / (1 + 1 + 8 + 7 + 3 + 4 + 5 + 7 + 4 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1187345745.

It is not an unprimeable number, because it can be changed into a prime (1187345743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13192686 + ... + 13192775.

It is an arithmetic number, because the mean of its divisors is an integer number (171505503).

Almost surely, 2^1187345745 is an apocalyptic number.

1187345745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1187345745 is a deficient number, since it is larger than the sum of its proper divisors (870720291).

1187345745 is a wasteful number, since it uses less digits than its factorization.

1187345745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26385472 (or 26385469 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 1187345745 is about 34457.8836407577. The cubic root of 1187345745 is about 1058.9100416595.

The spelling of 1187345745 in words is "one billion, one hundred eighty-seven million, three hundred forty-five thousand, seven hundred forty-five".