1840861 has 8 divisors (see below), whose sum is σ = 2062944. Its totient is φ = 1627920.

The previous prime is 1840847. The next prime is 1840871. The reversal of 1840861 is 1680481.

1840861 is nontrivially palindromic in base 6.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1840861 - 2⁵ = 1840829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1840871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1855 + ... + 2668.

It is an arithmetic number, because the mean of its divisors is an integer number (257868).

2^1840861 is an apocalyptic number.

1840861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1840861 is a deficient number, since it is larger than the sum of its proper divisors (222083).

1840861 is a wasteful number, since it uses less digits than its factorization.

1840861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4571.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1840861 is about 1356.7833283174. The cubic root of 1840861 is about 122.5576238683.

It can be divided in two parts, 1840 and 861, that added together give a triangular number (2701 = T₇₃).

The spelling of 1840861 in words is "one million, eight hundred forty thousand, eight hundred sixty-one".