1865141 has 2 divisors, whose sum is σ = 1865142. Its totient is φ = 1865140.

The previous prime is 1865137. The next prime is 1865147. The reversal of 1865141 is 1415681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 970225 + 894916 = 985^2 + 946^2 .

It is an emirp because it is prime and its reverse (1415681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1865141 - 2² = 1865137 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p₁₃₉₆₀₇ and since 1865141 and 139607 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1865141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1865147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932570 + 932571.

It is an arithmetic number, because the mean of its divisors is an integer number (932571).

2^1865141 is an apocalyptic number.

It is an amenable number.

1865141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1865141 is an equidigital number, since it uses as much as digits as its factorization.

1865141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 26.

The square root of 1865141 is about 1365.7016511669. The cubic root of 1865141 is about 123.0940959311.

The spelling of 1865141 in words is "one million, eight hundred sixty-five thousand, one hundred forty-one".