128746291 has 2 divisors, whose sum is σ = 128746292. Its totient is φ = 128746290.

The previous prime is 128746279. The next prime is 128746307. The reversal of 128746291 is 192647821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128746291 - 2¹⁵ = 128713523 is a prime.

It is not a weakly prime, because it can be changed into another prime (128746991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64373145 + 64373146.

It is an arithmetic number, because the mean of its divisors is an integer number (64373146).

Almost surely, 2^128746291 is an apocalyptic number.

128746291 is a deficient number, since it is larger than the sum of its proper divisors (1).

128746291 is an equidigital number, since it uses as much as digits as its factorization.

128746291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 128746291 is about 11346.6422786655. The cubic root of 128746291 is about 504.9459681433.

The spelling of 128746291 in words is "one hundred twenty-eight million, seven hundred forty-six thousand, two hundred ninety-one".