129268569 has 8 divisors (see below), whose sum is σ = 174540160. Its totient is φ = 85088016.

The previous prime is 129268567. The next prime is 129268583. The reversal of 129268569 is 965862921.

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

It is not a de Polignac number, because 129268569 - 2¹ = 129268567 is a prime.

It is a super-2 number, since 2×129268569² = 33420725862615522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129268567) 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 7 ways as a sum of consecutive naturals, for example, 272482 + ... + 272955.

It is an arithmetic number, because the mean of its divisors is an integer number (21817520).

Almost surely, 2^129268569 is an apocalyptic number.

It is an amenable number.

129268569 is a deficient number, since it is larger than the sum of its proper divisors (45271591).

129268569 is an equidigital number, since it uses as much as digits as its factorization.

129268569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545519.

The product of its digits is 466560, while the sum is 48.

The square root of 129268569 is about 11369.6336352584. The cubic root of 129268569 is about 505.6278424475.

The spelling of 129268569 in words is "one hundred twenty-nine million, two hundred sixty-eight thousand, five hundred sixty-nine".