129846025 has 27 divisors (see below), whose sum is σ = 168009429. Its totient is φ = 99546720.

The previous prime is 129846001. The next prime is 129846029. The reversal of 129846025 is 520648921.

The square root of 129846025 is 11395.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 978121 + 128867904 = 989^2 + 11352^2 .

It is not a de Polignac number, because 129846025 - 2⁷ = 129845897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129846029) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2449899 + ... + 2449951.

Almost surely, 2^129846025 is an apocalyptic number.

129846025 is the 11395-th square number.

129846025 is the 5698-th centered octagonal number.

It is an amenable number.

129846025 is a deficient number, since it is larger than the sum of its proper divisors (38163404).

129846025 is an frugal number, since it uses more digits than its factorization.

129846025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The cubic root of 129846025 is about 506.3796213329.

The spelling of 129846025 in words is "one hundred twenty-nine million, eight hundred forty-six thousand, twenty-five".