1861144 has 8 divisors (see below), whose sum is σ = 3489660. Its totient is φ = 930568.

The previous prime is 1861141. The next prime is 1861151. The reversal of 1861144 is 4411681.

It is a tau number, because it is divible by the number of its divisors (8).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116314 + ... + 116329.

2^1861144 is an apocalyptic number.

It is an amenable number.

1861144 is a deficient number, since it is larger than the sum of its proper divisors (1628516).

1861144 is a wasteful number, since it uses less digits than its factorization.

1861144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232649 (or 232645 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

The square root of 1861144 is about 1364.2375159773. The cubic root of 1861144 is about 123.0061027664.

The spelling of 1861144 in words is "one million, eight hundred sixty-one thousand, one hundred forty-four".