129454901 has 2 divisors, whose sum is σ = 129454902. Its totient is φ = 129454900.

The previous prime is 129454891. The next prime is 129454903. The reversal of 129454901 is 109454921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129367876 + 87025 = 11374^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 129454901 - 2¹⁸ = 129192757 is a prime.

Together with 129454903, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129454903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64727450 + 64727451.

It is an arithmetic number, because the mean of its divisors is an integer number (64727451).

Almost surely, 2^129454901 is an apocalyptic number.

It is an amenable number.

129454901 is a deficient number, since it is larger than the sum of its proper divisors (1).

129454901 is an equidigital number, since it uses as much as digits as its factorization.

129454901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 129454901 is about 11377.8249678926. The cubic root of 129454901 is about 505.8706687226.

The spelling of 129454901 in words is "one hundred twenty-nine million, four hundred fifty-four thousand, nine hundred one".