128502441 has 6 divisors (see below), whose sum is σ = 185614650. Its totient is φ = 85668288.

The previous prime is 128502433. The next prime is 128502457. The reversal of 128502441 is 144205821.

It can be written as a sum of positive squares in only one way, i.e., 82737216 + 45765225 = 9096^2 + 6765^2 .

It is not a de Polignac number, because 128502441 - 2³ = 128502433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128502431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7139016 + ... + 7139033.

It is an arithmetic number, because the mean of its divisors is an integer number (30935775).

Almost surely, 2^128502441 is an apocalyptic number.

It is an amenable number.

128502441 is a deficient number, since it is larger than the sum of its proper divisors (57112209).

128502441 is a wasteful number, since it uses less digits than its factorization.

128502441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14278055 (or 14278052 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 128502441 is about 11335.8917161377. The cubic root of 128502441 is about 504.6269715247.

The spelling of 128502441 in words is "one hundred twenty-eight million, five hundred two thousand, four hundred forty-one".