1995217 has 4 divisors (see below), whose sum is σ = 2280256. Its totient is φ = 1710180.

The previous prime is 1995211. The next prime is 1995221. The reversal of 1995217 is 7125991.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7125991 = 199 ⋅35809.

It is a cyclic number.

It is not a de Polignac number, because 1995217 - 2¹⁵ = 1962449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1995211) 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, 142509 + ... + 142522.

It is an arithmetic number, because the mean of its divisors is an integer number (570064).

2^1995217 is an apocalyptic number.

It is an amenable number.

1995217 is a deficient number, since it is larger than the sum of its proper divisors (285039).

1995217 is an equidigital number, since it uses as much as digits as its factorization.

1995217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285038.

The product of its digits is 5670, while the sum is 34.

The square root of 1995217 is about 1412.5215042611. The cubic root of 1995217 is about 125.8915881118.

It can be divided in two parts, 1995 and 217, that multiplied together give a triangular number (432915 = T₉₃₀).

The spelling of 1995217 in words is "one million, nine hundred ninety-five thousand, two hundred seventeen".