128126829 has 8 divisors (see below), whose sum is σ = 172432800. Its totient is φ = 84619376.

The previous prime is 128126827. The next prime is 128126833. The reversal of 128126829 is 928621821.

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 128126829 - 2¹ = 128126827 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128126821) 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, 199254 + ... + 199895.

It is an arithmetic number, because the mean of its divisors is an integer number (21554100).

Almost surely, 2^128126829 is an apocalyptic number.

It is an amenable number.

128126829 is a deficient number, since it is larger than the sum of its proper divisors (44305971).

128126829 is a wasteful number, since it uses less digits than its factorization.

128126829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399259.

The product of its digits is 27648, while the sum is 39.

The square root of 128126829 is about 11319.3122140879. The cubic root of 128126829 is about 504.1348176437.

The spelling of 128126829 in words is "one hundred twenty-eight million, one hundred twenty-six thousand, eight hundred twenty-nine".