1680922 has 8 divisors (see below), whose sum is σ = 2527776. Its totient is φ = 838332.

The previous prime is 1680919. The next prime is 1680929. The reversal of 1680922 is 2290861.

It is a happy number.

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

It is a d-powerful number, because it can be written as 1 + 6⁸ + 8² + 0 + 9³ + 2⁸ + 2⁸ .

It is not an unprimeable number, because it can be changed into a prime (1680929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243 + ... + 1849.

It is an arithmetic number, because the mean of its divisors is an integer number (315972).

2^1680922 is an apocalyptic number.

1680922 is a deficient number, since it is larger than the sum of its proper divisors (846854).

1680922 is a wasteful number, since it uses less digits than its factorization.

1680922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1680922 is about 1296.5037601180. The cubic root of 1680922 is about 118.9001822846.

The spelling of 1680922 in words is "one million, six hundred eighty thousand, nine hundred twenty-two".