1872855 has 16 divisors (see below), whose sum is σ = 3329760. Its totient is φ = 998784.

The previous prime is 1872847. The next prime is 1872859. The reversal of 1872855 is 5582781.

It is not a de Polignac number, because 1872855 - 2³ = 1872847 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1872859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6802 + ... + 7071.

It is an arithmetic number, because the mean of its divisors is an integer number (208110).

2^1872855 is an apocalyptic number.

1872855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1872855 is a deficient number, since it is larger than the sum of its proper divisors (1456905).

1872855 is a wasteful number, since it uses less digits than its factorization.

1872855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13887 (or 13881 counting only the distinct ones).

The product of its digits is 22400, while the sum is 36.

The square root of 1872855 is about 1368.5229263699. The cubic root of 1872855 is about 123.2635633303.

It can be divided in two parts, 18 and 72855, that multiplied together give a triangular number (1311390 = T₁₆₁₉).

The spelling of 1872855 in words is "one million, eight hundred seventy-two thousand, eight hundred fifty-five".