1851825 has 12 divisors (see below), whose sum is σ = 3061808. Its totient is φ = 987600.

The previous prime is 1851821. The next prime is 1851841. The reversal of 1851825 is 5281581.

It is not a de Polignac number, because 1851825 - 2² = 1851821 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1851792 and 1851801.

It is not an unprimeable number, because it can be changed into a prime (1851821) 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, 12271 + ... + 12420.

2^1851825 is an apocalyptic number.

1851825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1851825 is a deficient number, since it is larger than the sum of its proper divisors (1209983).

1851825 is a wasteful number, since it uses less digits than its factorization.

1851825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24704 (or 24699 counting only the distinct ones).

The product of its digits is 3200, while the sum is 30.

The square root of 1851825 is about 1360.8177688434. The cubic root of 1851825 is about 122.8004564134.

The spelling of 1851825 in words is "one million, eight hundred fifty-one thousand, eight hundred twenty-five".