1866042 has 12 divisors (see below), whose sum is σ = 4043130. Its totient is φ = 622008.

The previous prime is 1866037. The next prime is 1866043. The reversal of 1866042 is 2406681.

It can be written as a sum of positive squares in only one way, i.e., 1418481 + 447561 = 1191^2 + 669^2 .

It is a super-2 number, since 2×1866042² = 6964225491528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1865997 and 1866015.

It is not an unprimeable number, because it can be changed into a prime (1866043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51817 + ... + 51852.

2^1866042 is an apocalyptic number.

1866042 is an abundant number, since it is smaller than the sum of its proper divisors (2177088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1866042 is a wasteful number, since it uses less digits than its factorization.

1866042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103677 (or 103674 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1866042 is about 1366.0314784074. The cubic root of 1866042 is about 123.1139139013.

The spelling of 1866042 in words is "one million, eight hundred sixty-six thousand, forty-two".