1680292 has 6 divisors (see below), whose sum is σ = 2940518. Its totient is φ = 840144.

The previous prime is 1680277. The next prime is 1680313. The reversal of 1680292 is 2920861.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1679616 + 676 = 1296^2 + 26^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1680292.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210033 + ... + 210040.

2^1680292 is an apocalyptic number.

It is an amenable number.

1680292 is a deficient number, since it is larger than the sum of its proper divisors (1260226).

1680292 is a wasteful number, since it uses less digits than its factorization.

1680292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420077 (or 420075 counting only the distinct ones).

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

The square root of 1680292 is about 1296.2607762329. The cubic root of 1680292 is about 118.8853260579.

It can be divided in two parts, 16 and 80292, that added together give a palindrome (80308).

The spelling of 1680292 in words is "one million, six hundred eighty thousand, two hundred ninety-two".