1805925 has 36 divisors (see below), whose sum is σ = 3298400. Its totient is φ = 871200.

The previous prime is 1805911. The next prime is 1805941. The reversal of 1805925 is 5295081.

1805925 = 165² + 166² + ... + 214².

It is not a de Polignac number, because 1805925 - 2⁹ = 1805413 is a prime.

It is a super-2 number, since 2×1805925² = 6522730211250, which contains 22 as substring.

1805925 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1805892 and 1805901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8976 + ... + 9174.

2^1805925 is an apocalyptic number.

1805925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1805925 is a deficient number, since it is larger than the sum of its proper divisors (1492475).

1805925 is a wasteful number, since it uses less digits than its factorization.

1805925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 1805925 is about 1343.8470895158. The cubic root of 1805925 is about 121.7773642756. Note that the first 3 decimals are identical.

It can be divided in two parts, 180 and 5925, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 1805925 in words is "one million, eight hundred five thousand, nine hundred twenty-five".