801178145 has 4 divisors (see below), whose sum is σ = 961413780. Its totient is φ = 640942512.

The previous prime is 801178141. The next prime is 801178151. The reversal of 801178145 is 541871108.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 297804049 + 503374096 = 17257^2 + 22436^2 .

It is a cyclic number.

It is not a de Polignac number, because 801178145 - 2² = 801178141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (801178141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80117810 + ... + 80117819.

It is an arithmetic number, because the mean of its divisors is an integer number (240353445).

Almost surely, 2^801178145 is an apocalyptic number.

It is an amenable number.

801178145 is a deficient number, since it is larger than the sum of its proper divisors (160235635).

801178145 is a wasteful number, since it uses less digits than its factorization.

801178145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160235634.

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 801178145 is about 28305.0904432401. The cubic root of 801178145 is about 928.7732485922.

The spelling of 801178145 in words is "eight hundred one million, one hundred seventy-eight thousand, one hundred forty-five".