1697872 has 30 divisors (see below), whose sum is σ = 3619994. Its totient is φ = 770880.

The previous prime is 1697869. The next prime is 1697873. The reversal of 1697872 is 2787961.

It can be written as a sum of positive squares in only one way, i.e., 1628176 + 69696 = 1276^2 + 264^2 .

It is a d-powerful number, because it can be written as 1 + 6⁸ + 9² + 7³ + 8³ + 7⁵ + 2⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1697873) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1498 + ... + 2374.

2^1697872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1697872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1809997).

1697872 is an abundant number, since it is smaller than the sum of its proper divisors (1922122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1697872 is a wasteful number, since it uses less digits than its factorization.

1697872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907 (or 890 counting only the distinct ones).

The product of its digits is 42336, while the sum is 40.

The square root of 1697872 is about 1303.0241747566. The cubic root of 1697872 is about 119.2984997283.

The spelling of 1697872 in words is "one million, six hundred ninety-seven thousand, eight hundred seventy-two".