8172481 has 2 divisors, whose sum is σ = 8172482. Its totient is φ = 8172480.

The previous prime is 8172473. The next prime is 8172487. The reversal of 8172481 is 1842718.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6170256 + 2002225 = 2484^2 + 1415^2 .

It is a cyclic number.

It is not a de Polignac number, because 8172481 - 2³ = 8172473 is a prime.

It is a super-2 number, since 2×8172481² = 133578891390722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8172487) 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 as a sum of consecutive naturals, namely, 4086240 + 4086241.

It is an arithmetic number, because the mean of its divisors is an integer number (4086241).

Almost surely, 2^8172481 is an apocalyptic number.

It is an amenable number.

8172481 is a deficient number, since it is larger than the sum of its proper divisors (1).

8172481 is an equidigital number, since it uses as much as digits as its factorization.

8172481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 31.

The square root of 8172481 is about 2858.7551486617. The cubic root of 8172481 is about 201.4271338888.

The spelling of 8172481 in words is "eight million, one hundred seventy-two thousand, four hundred eighty-one".