1165013540 has 12 divisors (see below), whose sum is σ = 2446528476. Its totient is φ = 466005408.

The previous prime is 1165013537. The next prime is 1165013569. The reversal of 1165013540 is 453105611.

It can be written as a sum of positive squares in 2 ways, for example, as 198922816 + 966090724 = 14104^2 + 31082^2 .

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, 29125319 + ... + 29125358.

It is an arithmetic number, because the mean of its divisors is an integer number (203877373).

Almost surely, 2^1165013540 is an apocalyptic number.

1165013540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165013540 is an abundant number, since it is smaller than the sum of its proper divisors (1281514936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165013540 is a wasteful number, since it uses less digits than its factorization.

1165013540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58250686 (or 58250684 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1165013540 is about 34132.2946782076. The cubic root of 1165013540 is about 1052.2291387410.

The spelling of 1165013540 in words is "one billion, one hundred sixty-five million, thirteen thousand, five hundred forty".