10172321 has 2 divisors, whose sum is σ = 10172322. Its totient is φ = 10172320.

The previous prime is 10172221. The next prime is 10172329. The reversal of 10172321 is 12327101.

10172321 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6027025 + 4145296 = 2455^2 + 2036^2 .

It is a cyclic number.

It is not a de Polignac number, because 10172321 - 2¹⁰ = 10171297 is a prime.

It is a super-2 number, since 2×10172321² = 206952229054082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10172321.

It is not a weakly prime, because it can be changed into another prime (10172329) 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, 5086160 + 5086161.

It is an arithmetic number, because the mean of its divisors is an integer number (5086161).

Almost surely, 2^10172321 is an apocalyptic number.

It is an amenable number.

10172321 is a deficient number, since it is larger than the sum of its proper divisors (1).

10172321 is an equidigital number, since it uses as much as digits as its factorization.

10172321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 10172321 is about 3189.4076252496. The cubic root of 10172321 is about 216.6739424250.

Adding to 10172321 its reverse (12327101), we get a palindrome (22499422).

The spelling of 10172321 in words is "ten million, one hundred seventy-two thousand, three hundred twenty-one".