1855825 has 12 divisors (see below), whose sum is σ = 2422960. Its totient is φ = 1406160.

The previous prime is 1855823. The next prime is 1855849. The reversal of 1855825 is 5285581.

It is a happy number.

It is not a de Polignac number, because 1855825 - 2¹ = 1855823 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1855823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1479 + ... + 2428.

2^1855825 is an apocalyptic number.

It is an amenable number.

1855825 is a deficient number, since it is larger than the sum of its proper divisors (567135).

1855825 is a wasteful number, since it uses less digits than its factorization.

1855825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3936 (or 3931 counting only the distinct ones).

The product of its digits is 16000, while the sum is 34.

The square root of 1855825 is about 1362.2866805486. The cubic root of 1855825 is about 122.8888104388. Note that the first 4 decimals are identical.

It can be divided in two parts, 1855 and 825, that multiplied together give a triangular number (1530375 = T₁₇₄₉).

The spelling of 1855825 in words is "one million, eight hundred fifty-five thousand, eight hundred twenty-five".