1165522140 has 72 divisors (see below), whose sum is σ = 3540028128. Its totient is φ = 310400640.

The previous prime is 1165522133. The next prime is 1165522177. The reversal of 1165522140 is 412255611.

1165522140 is a `hidden beast` number, since 1 + 1 + 655 + 2 + 2 + 1 + 4 + 0 = 666.

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, 149745 + ... + 157335.

Almost surely, 2^1165522140 is an apocalyptic number.

1165522140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165522140 is an abundant number, since it is smaller than the sum of its proper divisors (2374505988).

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

1165522140 is a wasteful number, since it uses less digits than its factorization.

1165522140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8459 (or 8454 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1165522140 is about 34139.7442872673. The cubic root of 1165522140 is about 1052.3822373569.

Adding to 1165522140 its reverse (412255611), we get a palindrome (1577777751).

The spelling of 1165522140 in words is "one billion, one hundred sixty-five million, five hundred twenty-two thousand, one hundred forty".