128485013 has 4 divisors (see below), whose sum is σ = 128507808. Its totient is φ = 128462220.

The previous prime is 128485003. The next prime is 128485033. The reversal of 128485013 is 310584821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 128485013 - 2¹⁸ = 128222869 is a prime.

It is a super-2 number, since 2×128485013² = 33016797131220338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128485003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3920 + ... + 16502.

It is an arithmetic number, because the mean of its divisors is an integer number (32126952).

Almost surely, 2^128485013 is an apocalyptic number.

It is an amenable number.

128485013 is a deficient number, since it is larger than the sum of its proper divisors (22795).

128485013 is a wasteful number, since it uses less digits than its factorization.

128485013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22794.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 128485013 is about 11335.1229812473. The cubic root of 128485013 is about 504.6041573369.

The spelling of 128485013 in words is "one hundred twenty-eight million, four hundred eighty-five thousand, thirteen".