1684801 has 2 divisors, whose sum is σ = 1684802. Its totient is φ = 1684800.

The previous prime is 1684789. The next prime is 1684829. The reversal of 1684801 is 1084861.

1684801 is nontrivially palindromic in base 6.

It is an a-pointer prime, because the next prime (1684829) can be obtained adding 1684801 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1324801 + 360000 = 1151^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684801 - 2⁵ = 1684769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1684801.

It is not a weakly prime, because it can be changed into another prime (1684861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842400 + 842401.

It is an arithmetic number, because the mean of its divisors is an integer number (842401).

2^1684801 is an apocalyptic number.

It is an amenable number.

1684801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684801 is an equidigital number, since it uses as much as digits as its factorization.

1684801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1684801 is about 1297.9988443754. The cubic root of 1684801 is about 118.9915725030.

It can be divided in two parts, 1684 and 801, that added together give a triangular number (2485 = T₇₀).

The spelling of 1684801 in words is "one million, six hundred eighty-four thousand, eight hundred one".