128254877 has 4 divisors (see below), whose sum is σ = 133831200. Its totient is φ = 122678556.

The previous prime is 128254871. The next prime is 128254891. The reversal of 128254877 is 778452821.

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 an emirpimes, since its reverse is a distinct semiprime: 778452821 = 109 ⋅7141769.

It is a cyclic number.

It is not a de Polignac number, because 128254877 - 2²⁴ = 111477661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128254871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2788127 + ... + 2788172.

It is an arithmetic number, because the mean of its divisors is an integer number (33457800).

Almost surely, 2^128254877 is an apocalyptic number.

It is an amenable number.

128254877 is a deficient number, since it is larger than the sum of its proper divisors (5576323).

128254877 is an equidigital number, since it uses as much as digits as its factorization.

128254877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5576322.

The product of its digits is 250880, while the sum is 44.

The square root of 128254877 is about 11324.9669756693. The cubic root of 128254877 is about 504.3027032796.

The spelling of 128254877 in words is "one hundred twenty-eight million, two hundred fifty-four thousand, eight hundred seventy-seven".