172247401 has 2 divisors, whose sum is σ = 172247402. Its totient is φ = 172247400.

The previous prime is 172247393. The next prime is 172247441. The reversal of 172247401 is 104742271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170981776 + 1265625 = 13076^2 + 1125^2 .

It is a cyclic number.

It is not a de Polignac number, because 172247401 - 2³ = 172247393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172247401.

It is not a weakly prime, because it can be changed into another prime (172247441) 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 as a sum of consecutive naturals, namely, 86123700 + 86123701.

It is an arithmetic number, because the mean of its divisors is an integer number (86123701).

Almost surely, 2^172247401 is an apocalyptic number.

It is an amenable number.

172247401 is a deficient number, since it is larger than the sum of its proper divisors (1).

172247401 is an equidigital number, since it uses as much as digits as its factorization.

172247401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 172247401 is about 13124.3057340188. The cubic root of 172247401 is about 556.3962905051.

Adding to 172247401 its reverse (104742271), we get a palindrome (276989672).

The spelling of 172247401 in words is "one hundred seventy-two million, two hundred forty-seven thousand, four hundred one".