1856801 has 2 divisors, whose sum is σ = 1856802. Its totient is φ = 1856800.

The previous prime is 1856773. The next prime is 1856819. The reversal of 1856801 is 1086581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1677025 + 179776 = 1295^2 + 424^2 .

It is a cyclic number.

It is not a de Polignac number, because 1856801 - 2¹⁸ = 1594657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1856821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 928400 + 928401.

It is an arithmetic number, because the mean of its divisors is an integer number (928401).

2^1856801 is an apocalyptic number.

It is an amenable number.

1856801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1856801 is an equidigital number, since it uses as much as digits as its factorization.

1856801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 1856801 is about 1362.6448546852. The cubic root of 1856801 is about 122.9103495493.

The spelling of 1856801 in words is "one million, eight hundred fifty-six thousand, eight hundred one".