1855144 has 8 divisors (see below), whose sum is σ = 3478410. Its totient is φ = 927568.

The previous prime is 1855123. The next prime is 1855153. The reversal of 1855144 is 4415581.

It can be written as a sum of positive squares in only one way, i.e., 1855044 + 100 = 1362^2 + 10^2 .

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

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115939 + ... + 115954.

2^1855144 is an apocalyptic number.

It is an amenable number.

1855144 is a deficient number, since it is larger than the sum of its proper divisors (1623266).

1855144 is a wasteful number, since it uses less digits than its factorization.

1855144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231899 (or 231895 counting only the distinct ones).

The product of its digits is 3200, while the sum is 28.

The square root of 1855144 is about 1362.0367102248. The cubic root of 1855144 is about 122.8737771394.

It can be divided in two parts, 185 and 5144, that added together give a square (5329 = 73²).

The spelling of 1855144 in words is "one million, eight hundred fifty-five thousand, one hundred forty-four".