128877142 has 16 divisors (see below), whose sum is σ = 207175392. Its totient is φ = 59970240.

The previous prime is 128877121. The next prime is 128877157. The reversal of 128877142 is 241778821.

It is a junction number, because it is equal to n+sod(n) for n = 128877095 and 128877104.

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, 36159 + ... + 39562.

It is an arithmetic number, because the mean of its divisors is an integer number (12948462).

Almost surely, 2^128877142 is an apocalyptic number.

128877142 is a deficient number, since it is larger than the sum of its proper divisors (78298250).

128877142 is a wasteful number, since it uses less digits than its factorization.

128877142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75783.

The product of its digits is 50176, while the sum is 40.

The square root of 128877142 is about 11352.4068813622. The cubic root of 128877142 is about 505.1169771169.

The spelling of 128877142 in words is "one hundred twenty-eight million, eight hundred seventy-seven thousand, one hundred forty-two".