818125 has 40 divisors (see below), whose sum is σ = 1349568. Its totient is φ = 480000.

The previous prime is 818123. The next prime is 818143. The reversal of 818125 is 521818.

818125 = T₁₆ + T₁₇ + ... + T₁₆₉.

It is not a de Polignac number, because 818125 - 2¹ = 818123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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

Its product of digits (640) is a multiple of the sum of its prime divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 818125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818123) 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 39 ways as a sum of consecutive naturals, for example, 48117 + ... + 48133.

2⁸¹⁸¹²⁵ is an apocalyptic number.

818125 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

818125 is a deficient number, since it is larger than the sum of its proper divisors (531443).

818125 is a wasteful number, since it uses less digits than its factorization.

818125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55 (or 40 counting only the distinct ones).

The product of its digits is 640, while the sum is 25.

The square root of 818125 is about 904.5026257563. The cubic root of 818125 is about 93.5276210731.

It can be divided in two parts, 81812 and 5, that multiplied together give a triangular number (409060 = T₉₀₄).

The spelling of 818125 in words is "eight hundred eighteen thousand, one hundred twenty-five".