172142617 has 2 divisors, whose sum is σ = 172142618. Its totient is φ = 172142616.

The previous prime is 172142587. The next prime is 172142651. The reversal of 172142617 is 716241271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99620361 + 72522256 = 9981^2 + 8516^2 .

It is a cyclic number.

It is not a de Polignac number, because 172142617 - 2¹⁵ = 172109849 is a prime.

It is not a weakly prime, because it can be changed into another prime (172142657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86071308 + 86071309.

It is an arithmetic number, because the mean of its divisors is an integer number (86071309).

Almost surely, 2^172142617 is an apocalyptic number.

It is an amenable number.

172142617 is a deficient number, since it is larger than the sum of its proper divisors (1).

172142617 is an equidigital number, since it uses as much as digits as its factorization.

172142617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 31.

The square root of 172142617 is about 13120.3131441288. The cubic root of 172142617 is about 556.2834426386.

Adding to 172142617 its reverse (716241271), we get a palindrome (888383888).

The spelling of 172142617 in words is "one hundred seventy-two million, one hundred forty-two thousand, six hundred seventeen".