8172361 has 4 divisors (see below), whose sum is σ = 8180932. Its totient is φ = 8163792.

The previous prime is 8172349. The next prime is 8172371. The reversal of 8172361 is 1632718.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7952400 + 219961 = 2820^2 + 469^2 .

It is a cyclic number.

It is not a de Polignac number, because 8172361 - 2⁷ = 8172233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8172341) 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 3 ways as a sum of consecutive naturals, for example, 2646 + ... + 4831.

It is an arithmetic number, because the mean of its divisors is an integer number (2045233).

Almost surely, 2^8172361 is an apocalyptic number.

It is an amenable number.

8172361 is a deficient number, since it is larger than the sum of its proper divisors (8571).

8172361 is a wasteful number, since it uses less digits than its factorization.

8172361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8570.

The product of its digits is 2016, while the sum is 28.

The square root of 8172361 is about 2858.7341604284. The cubic root of 8172361 is about 201.4261480040.

It can be divided in two parts, 81 and 72361, that multiplied together give a square (5861241 = 2421²).

The spelling of 8172361 in words is "eight million, one hundred seventy-two thousand, three hundred sixty-one".