1689122 has 6 divisors (see below), whose sum is σ = 2536443.
Its totient is φ = 843642.
The previous prime is 1689113. The next prime is 1689167. The reversal of 1689122 is 2219861.
It can be written as a sum of positive squares in only one way, i.e., 844561 + 844561 = 919^2 + 919^2
It is an ABA number since it can be written as A⋅BA, here for A=2, B=919.
It is a Duffinian number.
It is an unprimeable number.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1379 + ... + 2297.
21689122 is an apocalyptic number.
1689122 is a deficient number, since it is larger than the sum of its proper divisors (847321).
1689122 is an frugal number, since it uses more digits than its factorization.
1689122 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1840 (or 921 counting only the distinct ones).
The product of its digits is 1728, while the sum is 29.
The square root of 1689122 is about 1299.6622638209.
The cubic root of 1689122 is about 119.0932113421.
The spelling of 1689122 in words is "one million, six hundred eighty-nine thousand, one hundred twenty-two".