1166947145 has 16 divisors (see below), whose sum is σ = 1723491840. Its totient is φ = 738638784.

The previous prime is 1166947139. The next prime is 1166947147. The reversal of 1166947145 is 5417496611.

It is a happy number.

It is not a de Polignac number, because 1166947145 - 2⁶ = 1166947081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1166947096 and 1166947105.

It is not an unprimeable number, because it can be changed into a prime (1166947147) 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, 1281905 + ... + 1282814.

It is an arithmetic number, because the mean of its divisors is an integer number (107718240).

Almost surely, 2^1166947145 is an apocalyptic number.

It is an amenable number.

1166947145 is a deficient number, since it is larger than the sum of its proper divisors (556544695).

1166947145 is a wasteful number, since it uses less digits than its factorization.

1166947145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564744.

The product of its digits is 181440, while the sum is 44.

The square root of 1166947145 is about 34160.6080888499. The cubic root of 1166947145 is about 1052.8109548504.

The spelling of 1166947145 in words is "one billion, one hundred sixty-six million, nine hundred forty-seven thousand, one hundred forty-five".