1859881 has 2 divisors, whose sum is σ = 1859882. Its totient is φ = 1859880.

The previous prime is 1859863. The next prime is 1859899. The reversal of 1859881 is 1889581.

It is a balanced prime because it is at equal distance from previous prime (1859863) and next prime (1859899).

It can be written as a sum of positive squares in only one way, i.e., 1625625 + 234256 = 1275^2 + 484^2 .

It is a cyclic number.

It is not a de Polignac number, because 1859881 - 2⁹ = 1859369 is a prime.

It is a super-2 number, since 2×1859881² = 6918314668322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1859831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 929940 + 929941.

It is an arithmetic number, because the mean of its divisors is an integer number (929941).

2^1859881 is an apocalyptic number.

It is an amenable number.

1859881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1859881 is an equidigital number, since it uses as much as digits as its factorization.

1859881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 40.

The square root of 1859881 is about 1363.7745414840. The cubic root of 1859881 is about 122.9782718796.

The spelling of 1859881 in words is "one million, eight hundred fifty-nine thousand, eight hundred eighty-one".