1855061 has 4 divisors (see below), whose sum is σ = 1997772. Its totient is φ = 1712352.

The previous prime is 1855039. The next prime is 1855093. The reversal of 1855061 is 1605581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1605581 = 61 ⋅26321.

It can be written as a sum of positive squares in 2 ways, for example, as 792100 + 1062961 = 890^2 + 1031^2 .

It is a cyclic number.

It is not a de Polignac number, because 1855061 - 2⁶ = 1854997 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 1855061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1855001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71336 + ... + 71361.

It is an arithmetic number, because the mean of its divisors is an integer number (499443).

2^1855061 is an apocalyptic number.

It is an amenable number.

1855061 is a deficient number, since it is larger than the sum of its proper divisors (142711).

1855061 is a wasteful number, since it uses less digits than its factorization.

1855061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142710.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1855061 is about 1362.0062408080. The cubic root of 1855061 is about 122.8719446355.

The spelling of 1855061 in words is "one million, eight hundred fifty-five thousand, sixty-one".