1812125 has 32 divisors (see below), whose sum is σ = 2745600. Its totient is φ = 1166400.

The previous prime is 1812121. The next prime is 1812131. The reversal of 1812125 is 5212181.

It is a happy number.

It is not a de Polignac number, because 1812125 - 2² = 1812121 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1812097 and 1812106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812121) 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 31 ways as a sum of consecutive naturals, for example, 16571 + ... + 16679.

It is an arithmetic number, because the mean of its divisors is an integer number (85800).

2^1812125 is an apocalyptic number.

It is an amenable number.

1812125 is a deficient number, since it is larger than the sum of its proper divisors (933475).

1812125 is a wasteful number, since it uses less digits than its factorization.

1812125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 140 counting only the distinct ones).

The product of its digits is 160, while the sum is 20.

The square root of 1812125 is about 1346.1519230755. The cubic root of 1812125 is about 121.9165648280.

The spelling of 1812125 in words is "one million, eight hundred twelve thousand, one hundred twenty-five".