128742612 has 24 divisors (see below), whose sum is σ = 300599712. Its totient is φ = 42885600.

The previous prime is 128742589. The next prime is 128742617. The reversal of 128742612 is 216247821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128742617) 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, 23187 + ... + 28197.

It is an arithmetic number, because the mean of its divisors is an integer number (12524988).

Almost surely, 2^128742612 is an apocalyptic number.

128742612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128742612 is an abundant number, since it is smaller than the sum of its proper divisors (171857100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128742612 is a wasteful number, since it uses less digits than its factorization.

128742612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7159 (or 7157 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 128742612 is about 11346.4801590625. The cubic root of 128742612 is about 504.9411583894.

The spelling of 128742612 in words is "one hundred twenty-eight million, seven hundred forty-two thousand, six hundred twelve".