1185867165 has 16 divisors (see below), whose sum is σ = 2168443008. Its totient is φ = 542110656.

The previous prime is 1185867161. The next prime is 1185867173. The reversal of 1185867165 is 5617685811.

It is a happy number.

It is not a de Polignac number, because 1185867165 - 2² = 1185867161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1185867161) 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, 5646882 + ... + 5647091.

It is an arithmetic number, because the mean of its divisors is an integer number (135527688).

Almost surely, 2^1185867165 is an apocalyptic number.

1185867165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1185867165 is a deficient number, since it is larger than the sum of its proper divisors (982575843).

1185867165 is a wasteful number, since it uses less digits than its factorization.

1185867165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11293988.

The product of its digits is 403200, while the sum is 48.

The square root of 1185867165 is about 34436.4220702442. The cubic root of 1185867165 is about 1058.4703119594.

It can be divided in two parts, 118586 and 7165, that added together give a triangular number (125751 = T₅₀₁).

The spelling of 1185867165 in words is "one billion, one hundred eighty-five million, eight hundred sixty-seven thousand, one hundred sixty-five".