128241787 has 2 divisors, whose sum is σ = 128241788. Its totient is φ = 128241786.

The previous prime is 128241749. The next prime is 128241797. The reversal of 128241787 is 787142821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128241787 - 2¹¹ = 128239739 is a prime.

It is a super-3 number, since 3×128241787³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (128241797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64120893 + 64120894.

It is an arithmetic number, because the mean of its divisors is an integer number (64120894).

Almost surely, 2^128241787 is an apocalyptic number.

128241787 is a deficient number, since it is larger than the sum of its proper divisors (1).

128241787 is an equidigital number, since it uses as much as digits as its factorization.

128241787 is an odious number, because the sum of its binary digits is odd.

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

The square root of 128241787 is about 11324.3890342923. The cubic root of 128241787 is about 504.2855459152.

The spelling of 128241787 in words is "one hundred twenty-eight million, two hundred forty-one thousand, seven hundred eighty-seven".