128587051 has 4 divisors (see below), whose sum is σ = 128880400. Its totient is φ = 128293704.

The previous prime is 128587033. The next prime is 128587057. The reversal of 128587051 is 150785821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128587051 - 2⁷ = 128586923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128587051.

It is not an unprimeable number, because it can be changed into a prime (128587057) 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, 146016 + ... + 146893.

It is an arithmetic number, because the mean of its divisors is an integer number (32220100).

Almost surely, 2^128587051 is an apocalyptic number.

128587051 is a deficient number, since it is larger than the sum of its proper divisors (293349).

128587051 is an equidigital number, since it uses as much as digits as its factorization.

128587051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293348.

The product of its (nonzero) digits is 22400, while the sum is 37.

The square root of 128587051 is about 11339.6230536998. The cubic root of 128587051 is about 504.7377012516.

The spelling of 128587051 in words is "one hundred twenty-eight million, five hundred eighty-seven thousand, fifty-one".