1722130 has 8 divisors (see below), whose sum is σ = 3099852. Its totient is φ = 688848.

The previous prime is 1722113. The next prime is 1722131. The reversal of 1722130 is 312271.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1713481 + 8649 = 1309^2 + 93^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1722131) 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, 86097 + ... + 86116.

2^1722130 is an apocalyptic number.

1722130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1722130 is a deficient number, since it is larger than the sum of its proper divisors (1377722).

1722130 is a wasteful number, since it uses less digits than its factorization.

1722130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172220.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 1722130 is about 1312.2995084964. The cubic root of 1722130 is about 119.8639662187.

The spelling of 1722130 in words is "one million, seven hundred twenty-two thousand, one hundred thirty".