128580457 has 2 divisors, whose sum is σ = 128580458. Its totient is φ = 128580456.

The previous prime is 128580451. The next prime is 128580493. The reversal of 128580457 is 754085821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84437721 + 44142736 = 9189^2 + 6644^2 .

It is a cyclic number.

It is not a de Polignac number, because 128580457 - 2¹⁵ = 128547689 is a prime.

It is not a weakly prime, because it can be changed into another prime (128580451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64290228 + 64290229.

It is an arithmetic number, because the mean of its divisors is an integer number (64290229).

Almost surely, 2^128580457 is an apocalyptic number.

It is an amenable number.

128580457 is a deficient number, since it is larger than the sum of its proper divisors (1).

128580457 is an equidigital number, since it uses as much as digits as its factorization.

128580457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 128580457 is about 11339.3322995668. The cubic root of 128580457 is about 504.7290733811.

The spelling of 128580457 in words is "one hundred twenty-eight million, five hundred eighty thousand, four hundred fifty-seven".