129528461 has 2 divisors, whose sum is σ = 129528462. Its totient is φ = 129528460.

The previous prime is 129528407. The next prime is 129528463. The reversal of 129528461 is 164825921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127554436 + 1974025 = 11294^2 + 1405^2 .

It is a cyclic number.

It is not a de Polignac number, because 129528461 - 2¹⁴ = 129512077 is a prime.

Together with 129528463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129528463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64764230 + 64764231.

It is an arithmetic number, because the mean of its divisors is an integer number (64764231).

Almost surely, 2^129528461 is an apocalyptic number.

It is an amenable number.

129528461 is a deficient number, since it is larger than the sum of its proper divisors (1).

129528461 is an equidigital number, since it uses as much as digits as its factorization.

129528461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The square root of 129528461 is about 11381.0571125884. The cubic root of 129528461 is about 505.9664673368.

The spelling of 129528461 in words is "one hundred twenty-nine million, five hundred twenty-eight thousand, four hundred sixty-one".