129454257 has 8 divisors (see below), whose sum is σ = 172751040. Its totient is φ = 86230160.

The previous prime is 129454243. The next prime is 129454291. The reversal of 129454257 is 752454921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129454257 - 2⁸ = 129454001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129454207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13869 + ... + 21242.

It is an arithmetic number, because the mean of its divisors is an integer number (21593880).

Almost surely, 2^129454257 is an apocalyptic number.

It is an amenable number.

129454257 is a deficient number, since it is larger than the sum of its proper divisors (43296783).

129454257 is a wasteful number, since it uses less digits than its factorization.

129454257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36343.

The product of its digits is 100800, while the sum is 39.

The square root of 129454257 is about 11377.7966671935. The cubic root of 129454257 is about 505.8698298687.

The spelling of 129454257 in words is "one hundred twenty-nine million, four hundred fifty-four thousand, two hundred fifty-seven".