1080987165 has 24 divisors (see below), whose sum is σ = 1874623608. Its totient is φ = 576245760.

The previous prime is 1080987137. The next prime is 1080987199. The reversal of 1080987165 is 5617890801.

It can be written as a sum of positive squares in 4 ways, for example, as 501670404 + 579316761 = 22398^2 + 24069^2 .

It is not a de Polignac number, because 1080987165 - 2⁵ = 1080987133 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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 1080987165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115045 + ... + 124085.

It is an arithmetic number, because the mean of its divisors is an integer number (78109317).

Almost surely, 2^1080987165 is an apocalyptic number.

1080987165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1080987165 is a deficient number, since it is larger than the sum of its proper divisors (793636443).

1080987165 is a wasteful number, since it uses less digits than its factorization.

1080987165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11709 (or 11706 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 1080987165 is about 32878.3692570054. The cubic root of 1080987165 is about 1026.2980706647.

The spelling of 1080987165 in words is "one billion, eighty million, nine hundred eighty-seven thousand, one hundred sixty-five".