1680429 has 8 divisors (see below), whose sum is σ = 2301280. Its totient is φ = 1089936.

The previous prime is 1680421. The next prime is 1680431. The reversal of 1680429 is 9240861.

1680429 = 297² + 298² + ... + 314².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1680429 - 2³ = 1680421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1680396 and 1680405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680421) 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, 7459 + ... + 7680.

It is an arithmetic number, because the mean of its divisors is an integer number (287660).

2^1680429 is an apocalyptic number.

It is an amenable number.

1680429 is a deficient number, since it is larger than the sum of its proper divisors (620851).

1680429 is a wasteful number, since it uses less digits than its factorization.

1680429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15179.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1680429 is about 1296.3136194610. The cubic root of 1680429 is about 118.8885570136. Note that the first 3 decimals are identical.

The spelling of 1680429 in words is "one million, six hundred eighty thousand, four hundred twenty-nine".