128210287 has 2 divisors, whose sum is σ = 128210288. Its totient is φ = 128210286.

The previous prime is 128210273. The next prime is 128210297. The reversal of 128210287 is 782012821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128210287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128210267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64105143 + 64105144.

It is an arithmetic number, because the mean of its divisors is an integer number (64105144).

Almost surely, 2^128210287 is an apocalyptic number.

128210287 is a deficient number, since it is larger than the sum of its proper divisors (1).

128210287 is an equidigital number, since it uses as much as digits as its factorization.

128210287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 128210287 is about 11322.9981453677. The cubic root of 128210287 is about 504.2442533541.

The spelling of 128210287 in words is "one hundred twenty-eight million, two hundred ten thousand, two hundred eighty-seven".