128457311 has 2 divisors, whose sum is σ = 128457312. Its totient is φ = 128457310.

The previous prime is 128457293. The next prime is 128457317. The reversal of 128457311 is 113754821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128457311 - 2¹⁰ = 128456287 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128457317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64228655 + 64228656.

It is an arithmetic number, because the mean of its divisors is an integer number (64228656).

Almost surely, 2^128457311 is an apocalyptic number.

128457311 is a deficient number, since it is larger than the sum of its proper divisors (1).

128457311 is an equidigital number, since it uses as much as digits as its factorization.

128457311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 32.

The square root of 128457311 is about 11333.9009612754. The cubic root of 128457311 is about 504.5678896852.

The spelling of 128457311 in words is "one hundred twenty-eight million, four hundred fifty-seven thousand, three hundred eleven".