128464025 has 6 divisors (see below), whose sum is σ = 159295422. Its totient is φ = 102771200.

The previous prime is 128464009. The next prime is 128464099. The reversal of 128464025 is 520464821.

It can be written as a sum of positive squares in 3 ways, for example, as 502681 + 127961344 = 709^2 + 11312^2 .

It is not a de Polignac number, because 128464025 - 2⁴ = 128464009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128463982 and 128464000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2569256 + ... + 2569305.

It is an arithmetic number, because the mean of its divisors is an integer number (26549237).

Almost surely, 2^128464025 is an apocalyptic number.

It is an amenable number.

128464025 is a deficient number, since it is larger than the sum of its proper divisors (30831397).

128464025 is an equidigital number, since it uses as much as digits as its factorization.

128464025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5138571 (or 5138566 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 128464025 is about 11334.1971484530. The cubic root of 128464025 is about 504.5766801795.

The spelling of 128464025 in words is "one hundred twenty-eight million, four hundred sixty-four thousand, twenty-five".