129424555 has 8 divisors (see below), whose sum is σ = 167256432. Its totient is φ = 95575008.

The previous prime is 129424549. The next prime is 129424567. The reversal of 129424555 is 555424921.

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 129424555 - 2¹¹ = 129422507 is a prime.

It is a Duffinian 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, 995509 + ... + 995638.

It is an arithmetic number, because the mean of its divisors is an integer number (20907054).

Almost surely, 2^129424555 is an apocalyptic number.

129424555 is a deficient number, since it is larger than the sum of its proper divisors (37831877).

129424555 is a wasteful number, since it uses less digits than its factorization.

129424555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991165.

The product of its digits is 72000, while the sum is 37.

The square root of 129424555 is about 11376.4913308102. The cubic root of 129424555 is about 505.8311379649.

The spelling of 129424555 in words is "one hundred twenty-nine million, four hundred twenty-four thousand, five hundred fifty-five".