129466834225 has 9 divisors (see below), whose sum is σ = 160541105323. Its totient is φ = 103572028120.

The previous prime is 129466834223. The next prime is 129466834247. The reversal of 129466834225 is 522438664921.

The square root of 129466834225 is 359815.

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

It can be written as a sum of positive squares in only one way, i.e., 46608060321 + 82858773904 = 215889^2 + 287852^2 .

It is not a de Polignac number, because 129466834225 - 2¹ = 129466834223 is a prime.

It is a super-2 number, since 2×129466834225² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129466834223) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1763094 + ... + 1835056.

Almost surely, 2^129466834225 is an apocalyptic number.

129466834225 is the 359815-th square number.

129466834225 is the 179908-th centered octagonal number.

It is an amenable number.

129466834225 is a deficient number, since it is larger than the sum of its proper divisors (31074271098).

129466834225 is an frugal number, since it uses more digits than its factorization.

129466834225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143936 (or 71968 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 52.

The spelling of 129466834225 in words is "one hundred twenty-nine billion, four hundred sixty-six million, eight hundred thirty-four thousand, two hundred twenty-five".