12155825 has 12 divisors (see below), whose sum is σ = 16443888. Its totient is φ = 8840400.

The previous prime is 12155821. The next prime is 12155827. The reversal of 12155825 is 52855121.

It is not a de Polignac number, because 12155825 - 2² = 12155821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12155821) 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, 21827 + ... + 22376.

It is an arithmetic number, because the mean of its divisors is an integer number (1370324).

Almost surely, 2^12155825 is an apocalyptic number.

It is an amenable number.

12155825 is a deficient number, since it is larger than the sum of its proper divisors (4288063).

12155825 is a wasteful number, since it uses less digits than its factorization.

12155825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44224 (or 44219 counting only the distinct ones).

The product of its digits is 4000, while the sum is 29.

The square root of 12155825 is about 3486.5204717598. The cubic root of 12155825 is about 229.9295625517.

The spelling of 12155825 in words is "twelve million, one hundred fifty-five thousand, eight hundred twenty-five".