1861022 has 12 divisors (see below), whose sum is σ = 2919840. Its totient is φ = 889548.

The previous prime is 1861021. The next prime is 1861033. The reversal of 1861022 is 2201681.

It is a junction number, because it is equal to n+sod(n) for n = 1860985 and 1861003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861021) 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, 179 + ... + 1937.

It is an arithmetic number, because the mean of its divisors is an integer number (243320).

2^1861022 is an apocalyptic number.

1861022 is a deficient number, since it is larger than the sum of its proper divisors (1058818).

1861022 is a wasteful number, since it uses less digits than its factorization.

1861022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807 (or 1784 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1861022 is about 1364.1928016230. The cubic root of 1861022 is about 123.0034149800.

The spelling of 1861022 in words is "one million, eight hundred sixty-one thousand, twenty-two".