1866242 has 8 divisors (see below), whose sum is σ = 3199296. Its totient is φ = 799812.

The previous prime is 1866239. The next prime is 1866247. The reversal of 1866242 is 2426681.

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

It is a super-3 number, since 3×1866242³ = 19499574371734333464, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1866247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66638 + ... + 66665.

It is an arithmetic number, because the mean of its divisors is an integer number (399912).

2^1866242 is an apocalyptic number.

1866242 is a deficient number, since it is larger than the sum of its proper divisors (1333054).

1866242 is a wasteful number, since it uses less digits than its factorization.

1866242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133312.

The product of its digits is 4608, while the sum is 29.

The square root of 1866242 is about 1366.1046812013. The cubic root of 1866242 is about 123.1183121416.

It can be divided in two parts, 186624 and 2, that multiplied together give a cube (373248 = 72³).

The spelling of 1866242 in words is "one million, eight hundred sixty-six thousand, two hundred forty-two".