128302457 has 2 divisors, whose sum is σ = 128302458. Its totient is φ = 128302456.

The previous prime is 128302429. The next prime is 128302463. The reversal of 128302457 is 754203821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69488896 + 58813561 = 8336^2 + 7669^2 .

It is a cyclic number.

It is not a de Polignac number, because 128302457 - 2¹⁶ = 128236921 is a prime.

It is not a weakly prime, because it can be changed into another prime (128302477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64151228 + 64151229.

It is an arithmetic number, because the mean of its divisors is an integer number (64151229).

Almost surely, 2^128302457 is an apocalyptic number.

It is an amenable number.

128302457 is a deficient number, since it is larger than the sum of its proper divisors (1).

128302457 is an equidigital number, since it uses as much as digits as its factorization.

128302457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 128302457 is about 11327.0674492562. The cubic root of 128302457 is about 504.3650576493.

The spelling of 128302457 in words is "one hundred twenty-eight million, three hundred two thousand, four hundred fifty-seven".