1861044 has 12 divisors (see below), whose sum is σ = 4342464. Its totient is φ = 620344.

The previous prime is 1861039. The next prime is 1861061. The reversal of 1861044 is 4401681.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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, 77532 + ... + 77555.

It is an arithmetic number, because the mean of its divisors is an integer number (361872).

2^1861044 is an apocalyptic number.

It is an amenable number.

1861044 is an abundant number, since it is smaller than the sum of its proper divisors (2481420).

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

1861044 is a wasteful number, since it uses less digits than its factorization.

1861044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155094 (or 155092 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1861044 is about 1364.2008649755. The cubic root of 1861044 is about 123.0038996715.

The spelling of 1861044 in words is "one million, eight hundred sixty-one thousand, forty-four".