1166154201 has 9 divisors (see below), whose sum is σ = 1684592949. Its totient is φ = 777367836.

The previous prime is 1166154179. The next prime is 1166154217. The reversal of 1166154201 is 1024516611.

The square root of 1166154201 is 34149.

It is a perfect power (a square), and thus also a powerful number.

1166154201 is a `hidden beast` number, since 1 + 1 + 6 + 615 + 42 + 0 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1166154201 - 2⁹ = 1166153689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1166154401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 96756 + ... + 108138.

Almost surely, 2^1166154201 is an apocalyptic number.

1166154201 is the 34149-th square number.

1166154201 is the 17075-th centered octagonal number.

It is an amenable number.

1166154201 is a deficient number, since it is larger than the sum of its proper divisors (518438748).

1166154201 is an frugal number, since it uses more digits than its factorization.

1166154201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22772 (or 11386 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The cubic root of 1166154201 is about 1052.5724381097.

The spelling of 1166154201 in words is "one billion, one hundred sixty-six million, one hundred fifty-four thousand, two hundred one".