1152621665 has 16 divisors (see below), whose sum is σ = 1524186048. Its totient is φ = 831370176.

The previous prime is 1152621649. The next prime is 1152621667. The reversal of 1152621665 is 5661262511.

It is not a de Polignac number, because 1152621665 - 2⁴ = 1152621649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1152621667) 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, 203399 + ... + 208988.

It is an arithmetic number, because the mean of its divisors is an integer number (95261628).

Almost surely, 2^1152621665 is an apocalyptic number.

It is an amenable number.

1152621665 is a deficient number, since it is larger than the sum of its proper divisors (371564383).

1152621665 is a wasteful number, since it uses less digits than its factorization.

1152621665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412448.

The product of its digits is 21600, while the sum is 35.

The square root of 1152621665 is about 33950.2822521404. The cubic root of 1152621665 is about 1048.4850912741.

The spelling of 1152621665 in words is "one billion, one hundred fifty-two million, six hundred twenty-one thousand, six hundred sixty-five".