1861067 has 4 divisors (see below), whose sum is σ = 2004240. Its totient is φ = 1717896.

The previous prime is 1861061. The next prime is 1861081. The reversal of 1861067 is 7601681.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1861067 - 2¹² = 1856971 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1861061) 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, 71567 + ... + 71592.

It is an arithmetic number, because the mean of its divisors is an integer number (501060).

2^1861067 is an apocalyptic number.

1861067 is a deficient number, since it is larger than the sum of its proper divisors (143173).

1861067 is a wasteful number, since it uses less digits than its factorization.

1861067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143172.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1861067 is about 1364.2092947931. The cubic root of 1861067 is about 123.0044063903.

The spelling of 1861067 in words is "one million, eight hundred sixty-one thousand, sixty-seven".