1165687745 has 4 divisors (see below), whose sum is σ = 1398825300. Its totient is φ = 932550192.

The previous prime is 1165687729. The next prime is 1165687751. The reversal of 1165687745 is 5477865611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5477865611 = 1879 ⋅2915309.

It can be written as a sum of positive squares in 2 ways, for example, as 852114481 + 313573264 = 29191^2 + 17708^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165687745 - 2⁴ = 1165687729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1165687693 and 1165687702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116568770 + ... + 116568779.

It is an arithmetic number, because the mean of its divisors is an integer number (349706325).

Almost surely, 2^1165687745 is an apocalyptic number.

It is an amenable number.

1165687745 is a deficient number, since it is larger than the sum of its proper divisors (233137555).

1165687745 is an equidigital number, since it uses as much as digits as its factorization.

1165687745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233137554.

The product of its digits is 1411200, while the sum is 50.

The square root of 1165687745 is about 34142.1696000708. The cubic root of 1165687745 is about 1052.4320781109.

The spelling of 1165687745 in words is "one billion, one hundred sixty-five million, six hundred eighty-seven thousand, seven hundred forty-five".