1154116521 has 6 divisors (see below), whose sum is σ = 1667057210. Its totient is φ = 769411008.

The previous prime is 1154116507. The next prime is 1154116529. The reversal of 1154116521 is 1256114511.

1154116521 is a `hidden beast` number, since 1 + 1 + 5 + 4 + 1 + 1 + 652 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 649485225 + 504631296 = 25485^2 + 22464^2 .

It is not a de Polignac number, because 1154116521 - 2¹⁴ = 1154100137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1154116529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64117576 + ... + 64117593.

Almost surely, 2^1154116521 is an apocalyptic number.

It is an amenable number.

1154116521 is a deficient number, since it is larger than the sum of its proper divisors (512940689).

1154116521 is a wasteful number, since it uses less digits than its factorization.

1154116521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128235175 (or 128235172 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

The square root of 1154116521 is about 33972.2904879845. The cubic root of 1154116521 is about 1048.9381619265.

The spelling of 1154116521 in words is "one billion, one hundred fifty-four million, one hundred sixteen thousand, five hundred twenty-one".