1866742 has 8 divisors (see below), whose sum is σ = 2808576. Its totient is φ = 930552.

The previous prime is 1866737. The next prime is 1866751. The reversal of 1866742 is 2476681.

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

It is a junction number, because it is equal to n+sod(n) for n = 1866698 and 1866707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453 + ... + 1984.

It is an arithmetic number, because the mean of its divisors is an integer number (351072).

2^1866742 is an apocalyptic number.

1866742 is a deficient number, since it is larger than the sum of its proper divisors (941834).

1866742 is a wasteful number, since it uses less digits than its factorization.

1866742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822.

The product of its digits is 16128, while the sum is 34.

The square root of 1866742 is about 1366.2876710269. The cubic root of 1866742 is about 123.1293063676.

The spelling of 1866742 in words is "one million, eight hundred sixty-six thousand, seven hundred forty-two".