128134087 has 2 divisors, whose sum is σ = 128134088. Its totient is φ = 128134086.

The previous prime is 128134073. The next prime is 128134091. The reversal of 128134087 is 780431821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128134087 - 2¹⁵ = 128101319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128134037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64067043 + 64067044.

It is an arithmetic number, because the mean of its divisors is an integer number (64067044).

Almost surely, 2^128134087 is an apocalyptic number.

128134087 is a deficient number, since it is larger than the sum of its proper divisors (1).

128134087 is an equidigital number, since it uses as much as digits as its factorization.

128134087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 128134087 is about 11319.6328120659. The cubic root of 128134087 is about 504.1443367050.

It can be divided in two parts, 12813 and 4087, that added together give a square (16900 = 130²).

The spelling of 128134087 in words is "one hundred twenty-eight million, one hundred thirty-four thousand, eighty-seven".