1722201 has 8 divisors (see below), whose sum is σ = 2472960. Its totient is φ = 1059792.

The previous prime is 1722199. The next prime is 1722209. The reversal of 1722201 is 1022271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1722201 - 2¹ = 1722199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1722209) 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 in 7 ways as a sum of consecutive naturals, for example, 22041 + ... + 22118.

It is an arithmetic number, because the mean of its divisors is an integer number (309120).

2^1722201 is an apocalyptic number.

It is an amenable number.

1722201 is a deficient number, since it is larger than the sum of its proper divisors (750759).

1722201 is a wasteful number, since it uses less digits than its factorization.

1722201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44175.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 1722201 is about 1312.3265599690. The cubic root of 1722201 is about 119.8656134472.

Adding to 1722201 its reverse (1022271), we get a palindrome (2744472).

The spelling of 1722201 in words is "one million, seven hundred twenty-two thousand, two hundred one".