1722106 has 4 divisors (see below), whose sum is σ = 2583162. Its totient is φ = 861052.

The previous prime is 1722089. The next prime is 1722113. The reversal of 1722106 is 6012271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1121481 + 600625 = 1059^2 + 775^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430525 + ... + 430528.

2^1722106 is an apocalyptic number.

1722106 is a deficient number, since it is larger than the sum of its proper divisors (861056).

1722106 is an equidigital number, since it uses as much as digits as its factorization.

1722106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861055.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 1722106 is about 1312.2903642106. The cubic root of 1722106 is about 119.8634093989.

Adding to 1722106 its reverse (6012271), we get a palindrome (7734377).

It can be divided in two parts, 172 and 2106, that added together give a triangular number (2278 = T₆₇).

The spelling of 1722106 in words is "one million, seven hundred twenty-two thousand, one hundred six".