129420459 has 48 divisors (see below), whose sum is σ = 219428352. Its totient is φ = 71985024.

The previous prime is 129420449. The next prime is 129420461. The reversal of 129420459 is 954024921.

It is not a de Polignac number, because 129420459 - 2¹¹ = 129418411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129420409) 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 in 47 ways as a sum of consecutive naturals, for example, 491962 + ... + 492224.

It is an arithmetic number, because the mean of its divisors is an integer number (4571424).

Almost surely, 2^129420459 is an apocalyptic number.

129420459 is a deficient number, since it is larger than the sum of its proper divisors (90007893).

129420459 is a wasteful number, since it uses less digits than its factorization.

129420459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 129420459 is about 11376.3113090316. The cubic root of 129420459 is about 505.8258017643.

The spelling of 129420459 in words is "one hundred twenty-nine million, four hundred twenty thousand, four hundred fifty-nine".