1866441 has 8 divisors (see below), whose sum is σ = 2496960. Its totient is φ = 1240112.

The previous prime is 1866439. The next prime is 1866451. The reversal of 1866441 is 1446681.

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 1866441 - 2¹ = 1866439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1866399 and 1866408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866451) 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, 211 + ... + 1943.

It is an arithmetic number, because the mean of its divisors is an integer number (312120).

2^1866441 is an apocalyptic number.

It is an amenable number.

1866441 is a deficient number, since it is larger than the sum of its proper divisors (630519).

1866441 is a wasteful number, since it uses less digits than its factorization.

1866441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095.

The product of its digits is 4608, while the sum is 30.

The square root of 1866441 is about 1366.1775140881. The cubic root of 1866441 is about 123.1226880788.

The spelling of 1866441 in words is "one million, eight hundred sixty-six thousand, four hundred forty-one".