1858081 has 2 divisors, whose sum is σ = 1858082. Its totient is φ = 1858080.

The previous prime is 1858061. The next prime is 1858091. The reversal of 1858081 is 1808581.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1083681 + 774400 = 1041^2 + 880^2 .

It is an emirp because it is prime and its reverse (1808581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1858081 - 2¹¹ = 1856033 is a prime.

It is a super-2 number, since 2×1858081² = 6904930005122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1858061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 929040 + 929041.

It is an arithmetic number, because the mean of its divisors is an integer number (929041).

2^1858081 is an apocalyptic number.

It is an amenable number.

1858081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1858081 is an equidigital number, since it uses as much as digits as its factorization.

1858081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2560, while the sum is 31.

The square root of 1858081 is about 1363.1144486066. The cubic root of 1858081 is about 122.9385861257.

The spelling of 1858081 in words is "one million, eight hundred fifty-eight thousand, eighty-one".