12129025 has 6 divisors (see below), whose sum is σ = 15040022. Its totient is φ = 9703200.

The previous prime is 12129017. The next prime is 12129031. The reversal of 12129025 is 52092121.

It can be written as a sum of positive squares in 3 ways, for example, as 11664 + 12117361 = 108^2 + 3481^2 .

It is not a de Polignac number, because 12129025 - 2³ = 12129017 is a prime.

It is a super-2 number, since 2×12129025² = 294226494901250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12128987 and 12129005.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 242556 + ... + 242605.

Almost surely, 2^12129025 is an apocalyptic number.

It is an amenable number.

12129025 is a deficient number, since it is larger than the sum of its proper divisors (2910997).

12129025 is an equidigital number, since it uses as much as digits as its factorization.

12129025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485171 (or 485166 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 12129025 is about 3482.6749776573. The cubic root of 12129025 is about 229.7604626517.

The spelling of 12129025 in words is "twelve million, one hundred twenty-nine thousand, twenty-five".