129000565 has 8 divisors (see below), whose sum is σ = 155099808. Its totient is φ = 103001040.

The previous prime is 129000551. The next prime is 129000577. The reversal of 129000565 is 565000921.

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

It is not a de Polignac number, because 129000565 - 2¹³ = 128992373 is a prime.

It is a super-2 number, since 2×129000565² = 33282291540638450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22051 + ... + 27280.

It is an arithmetic number, because the mean of its divisors is an integer number (19387476).

Almost surely, 2^129000565 is an apocalyptic number.

It is an amenable number.

129000565 is a deficient number, since it is larger than the sum of its proper divisors (26099243).

129000565 is an equidigital number, since it uses as much as digits as its factorization.

129000565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49859.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 129000565 is about 11357.8415643114. The cubic root of 129000565 is about 505.2781723987.

The spelling of 129000565 in words is "one hundred twenty-nine million, five hundred sixty-five", and thus it is an aban number.