129225225 has 12 divisors (see below), whose sum is σ = 213652496. Its totient is φ = 68920080.

The previous prime is 129225223. The next prime is 129225233. The reversal of 129225225 is 522522921.

It is not a de Polignac number, because 129225225 - 2¹ = 129225223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129225192 and 129225201.

It is not an unprimeable number, because it can be changed into a prime (129225221) 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, 861427 + ... + 861576.

Almost surely, 2^129225225 is an apocalyptic number.

129225225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129225225 is a deficient number, since it is larger than the sum of its proper divisors (84427271).

129225225 is a wasteful number, since it uses less digits than its factorization.

129225225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723016 (or 1723011 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 129225225 is about 11367.7273454284. The cubic root of 129225225 is about 505.5713234671.

The spelling of 129225225 in words is "one hundred twenty-nine million, two hundred twenty-five thousand, two hundred twenty-five".