8161129 has 8 divisors (see below), whose sum is σ = 8340488. Its totient is φ = 7983360.

The previous prime is 8161121. The next prime is 8161183. The reversal of 8161129 is 9211618.

It is a happy number.

8161129 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 27225 + 8133904 = 165^2 + 2852^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8161129 - 2³ = 8161121 is a prime.

It is a Duffinian number.

8161129 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8161097 and 8161106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161121) 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 7 ways as a sum of consecutive naturals, for example, 20359 + ... + 20755.

It is an arithmetic number, because the mean of its divisors is an integer number (1042561).

Almost surely, 2^8161129 is an apocalyptic number.

It is an amenable number.

8161129 is a deficient number, since it is larger than the sum of its proper divisors (179359).

8161129 is a wasteful number, since it uses less digits than its factorization.

8161129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795.

The product of its digits is 864, while the sum is 28.

The square root of 8161129 is about 2856.7689791091. The cubic root of 8161129 is about 201.3338264270. Note that the first 3 decimals are identical.

The spelling of 8161129 in words is "eight million, one hundred sixty-one thousand, one hundred twenty-nine".