1826861 has 6 divisors (see below), whose sum is σ = 1888686. Its totient is φ = 1767000.

The previous prime is 1826849. The next prime is 1826863. The reversal of 1826861 is 1686281.

It can be written as a sum of positive squares in only one way, i.e., 1177225 + 649636 = 1085^2 + 806^2 .

It is not a de Polignac number, because 1826861 - 2¹⁴ = 1810477 is a prime.

It is a super-2 number, since 2×1826861² = 6674842226642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1826863) 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 5 ways as a sum of consecutive naturals, for example, 11 + ... + 1911.

It is an arithmetic number, because the mean of its divisors is an integer number (314781).

2^1826861 is an apocalyptic number.

It is an amenable number.

1826861 is a deficient number, since it is larger than the sum of its proper divisors (61825).

1826861 is an equidigital number, since it uses as much as digits as its factorization.

1826861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963 (or 1932 counting only the distinct ones).

The product of its digits is 4608, while the sum is 32.

The square root of 1826861 is about 1351.6142201087. The cubic root of 1826861 is about 122.2461437414.

The spelling of 1826861 in words is "one million, eight hundred twenty-six thousand, eight hundred sixty-one".