1729166 has 4 divisors (see below), whose sum is σ = 2593752. Its totient is φ = 864582.

The previous prime is 1729157. The next prime is 1729187. The reversal of 1729166 is 6619271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6619271 = 433 ⋅15287.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432290 + ... + 432293.

It is an arithmetic number, because the mean of its divisors is an integer number (648438).

2^1729166 is an apocalyptic number.

1729166 is a deficient number, since it is larger than the sum of its proper divisors (864586).

1729166 is an equidigital number, since it uses as much as digits as its factorization.

1729166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864585.

The product of its digits is 4536, while the sum is 32.

The square root of 1729166 is about 1314.9775663486. The cubic root of 1729166 is about 120.0269846722.

The spelling of 1729166 in words is "one million, seven hundred twenty-nine thousand, one hundred sixty-six".