128924485 has 8 divisors (see below), whose sum is σ = 155748600. Its totient is φ = 102446784.

The previous prime is 128924429. The next prime is 128924503. The reversal of 128924485 is 584429821.

It can be written as a sum of positive squares in 4 ways, for example, as 7064964 + 121859521 = 2658^2 + 11039^2 .

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 128924485 - 2⁷ = 128924357 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 85782 + ... + 87271.

It is an arithmetic number, because the mean of its divisors is an integer number (19468575).

Almost surely, 2^128924485 is an apocalyptic number.

It is an amenable number.

128924485 is a deficient number, since it is larger than the sum of its proper divisors (26824115).

128924485 is a wasteful number, since it uses less digits than its factorization.

128924485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173207.

The product of its digits is 184320, while the sum is 43.

The square root of 128924485 is about 11354.4918424384. The cubic root of 128924485 is about 505.1788210949.

The spelling of 128924485 in words is "one hundred twenty-eight million, nine hundred twenty-four thousand, four hundred eighty-five".