1680434 has 16 divisors (see below), whose sum is σ = 2980800. Its totient is φ = 695184.

The previous prime is 1680431. The next prime is 1680439. The reversal of 1680434 is 4340861.

It is a d-powerful number, because it can be written as 1 + 6⁸ + 8 + 0 + 4² + 3⁶ + 4³ .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1680431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1664 + ... + 2475.

It is an arithmetic number, because the mean of its divisors is an integer number (186300).

2^1680434 is an apocalyptic number.

1680434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1680434 is a deficient number, since it is larger than the sum of its proper divisors (1300366).

1680434 is a wasteful number, since it uses less digits than its factorization.

1680434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4177.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1680434 is about 1296.3155480052. The cubic root of 1680434 is about 118.8886749284. Note that the first 3 decimals are identical.

The spelling of 1680434 in words is "one million, six hundred eighty thousand, four hundred thirty-four".