1861834 has 16 divisors (see below), whose sum is σ = 3041640. Its totient is φ = 849600.

The previous prime is 1861831. The next prime is 1861859. The reversal of 1861834 is 4381681.

It can be written as a sum of positive squares in 4 ways, for example, as 1432809 + 429025 = 1197^2 + 655^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1861796 and 1861805.

It is not an unprimeable number, because it can be changed into a prime (1861831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2272 + ... + 2980.

2^1861834 is an apocalyptic number.

1861834 is a deficient number, since it is larger than the sum of its proper divisors (1179806).

1861834 is a wasteful number, since it uses less digits than its factorization.

1861834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825.

The product of its digits is 4608, while the sum is 31.

The square root of 1861834 is about 1364.4903810581. The cubic root of 1861834 is about 123.0213019708.

The spelling of 1861834 in words is "one million, eight hundred sixty-one thousand, eight hundred thirty-four".