1166255145 has 32 divisors (see below), whose sum is σ = 2261831040. Its totient is φ = 565456320.

The previous prime is 1166255087. The next prime is 1166255147. The reversal of 1166255145 is 5415526611.

1166255145 is a `hidden beast` number, since 1 + 1 + 6 + 62 + 551 + 45 = 666.

It is not a de Polignac number, because 1166255145 - 2¹² = 1166251049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1166255147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 391194 + ... + 394163.

It is an arithmetic number, because the mean of its divisors is an integer number (70682220).

Almost surely, 2^1166255145 is an apocalyptic number.

1166255145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1166255145 is a deficient number, since it is larger than the sum of its proper divisors (1095575895).

1166255145 is a wasteful number, since it uses less digits than its factorization.

1166255145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785382 (or 785376 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The square root of 1166255145 is about 34150.4779615161. The cubic root of 1166255145 is about 1052.6028079660.

It can be divided in two parts, 1166255 and 145, that added together give a square (1166400 = 1080²).

The spelling of 1166255145 in words is "one billion, one hundred sixty-six million, two hundred fifty-five thousand, one hundred forty-five".