1861066 has 8 divisors (see below), whose sum is σ = 2817540. Its totient is φ = 921888.

The previous prime is 1861061. The next prime is 1861081. The reversal of 1861066 is 6601681.

It can be written as a sum of positive squares in 2 ways, for example, as 1677025 + 184041 = 1295^2 + 429^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1861061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4051 + ... + 4486.

2^1861066 is an apocalyptic number.

1861066 is a deficient number, since it is larger than the sum of its proper divisors (956474).

1861066 is a wasteful number, since it uses less digits than its factorization.

1861066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8648.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1861066 is about 1364.2089282804. The cubic root of 1861066 is about 123.0043843591.

The spelling of 1861066 in words is "one million, eight hundred sixty-one thousand, sixty-six".