128207441 has 4 divisors (see below), whose sum is σ = 129830400. Its totient is φ = 126584484.

The previous prime is 128207423. The next prime is 128207447. The reversal of 128207441 is 144702821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128207441 - 2⁶ = 128207377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128207447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 811361 + ... + 811518.

It is an arithmetic number, because the mean of its divisors is an integer number (32457600).

Almost surely, 2^128207441 is an apocalyptic number.

It is an amenable number.

128207441 is a deficient number, since it is larger than the sum of its proper divisors (1622959).

128207441 is an equidigital number, since it uses as much as digits as its factorization.

128207441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622958.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 128207441 is about 11322.8724712416. The cubic root of 128207441 is about 504.2405222708.

The spelling of 128207441 in words is "one hundred twenty-eight million, two hundred seven thousand, four hundred forty-one".