128142260 has 24 divisors (see below), whose sum is σ = 284928840. Its totient is φ = 48241664.

The previous prime is 128142247. The next prime is 128142281. The reversal of 128142260 is 62241821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 56130064 + 72012196 = 7492^2 + 8486^2 .

It is a congruent 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, 188105 + ... + 188784.

It is an arithmetic number, because the mean of its divisors is an integer number (11872035).

Almost surely, 2^128142260 is an apocalyptic number.

128142260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128142260 is an abundant number, since it is smaller than the sum of its proper divisors (156786580).

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

128142260 is a wasteful number, since it uses less digits than its factorization.

128142260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376915 (or 376913 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 128142260 is about 11319.9938162527. The cubic root of 128142260 is about 504.1550553830.

The spelling of 128142260 in words is "one hundred twenty-eight million, one hundred forty-two thousand, two hundred sixty".