8155725 has 24 divisors (see below), whose sum is σ = 13853280. Its totient is φ = 4230720.

The previous prime is 8155717. The next prime is 8155727. The reversal of 8155725 is 5275518.

It is a happy number.

It is not a de Polignac number, because 8155725 - 2³ = 8155717 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8155727) 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 23 ways as a sum of consecutive naturals, for example, 1306 + ... + 4244.

It is an arithmetic number, because the mean of its divisors is an integer number (577220).

Almost surely, 2^8155725 is an apocalyptic number.

It is an amenable number.

8155725 is a deficient number, since it is larger than the sum of its proper divisors (5697555).

8155725 is a wasteful number, since it uses less digits than its factorization.

8155725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2989 (or 2984 counting only the distinct ones).

The product of its digits is 14000, while the sum is 33.

The square root of 8155725 is about 2855.8229987168. The cubic root of 8155725 is about 201.2893779921.

The spelling of 8155725 in words is "eight million, one hundred fifty-five thousand, seven hundred twenty-five".