2172017 has 4 divisors (see below), whose sum is σ = 2177136. Its totient is φ = 2166900.

The previous prime is 2172007. The next prime is 2172031. The reversal of 2172017 is 7102712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2172017 - 2⁸ = 2171761 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2172017.

It is not an unprimeable number, because it can be changed into a prime (2172007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1859 + ... + 2792.

It is an arithmetic number, because the mean of its divisors is an integer number (544284).

2^2172017 is an apocalyptic number.

It is an amenable number.

2172017 is a deficient number, since it is larger than the sum of its proper divisors (5119).

2172017 is an equidigital number, since it uses as much as digits as its factorization.

2172017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5118.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 2172017 is about 1473.7764416627. The cubic root of 2172017 is about 129.5053589708.

Adding to 2172017 its reverse (7102712), we get a palindrome (9274729).

The spelling of 2172017 in words is "two million, one hundred seventy-two thousand, seventeen".