1691134 has 4 divisors (see below), whose sum is σ = 2536704. Its totient is φ = 845566.

The previous prime is 1691119. The next prime is 1691141. The reversal of 1691134 is 4311961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4311961 = 89 ⋅48449.

It is a junction number, because it is equal to n+sod(n) for n = 1691099 and 1691108.

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, 422782 + ... + 422785.

It is an arithmetic number, because the mean of its divisors is an integer number (634176).

2^1691134 is an apocalyptic number.

1691134 is a deficient number, since it is larger than the sum of its proper divisors (845570).

1691134 is an equidigital number, since it uses as much as digits as its factorization.

1691134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845569.

The product of its digits is 648, while the sum is 25.

The square root of 1691134 is about 1300.4360807052. The cubic root of 1691134 is about 119.1404785939.

The spelling of 1691134 in words is "one million, six hundred ninety-one thousand, one hundred thirty-four".