128332461 has 4 divisors (see below), whose sum is σ = 171109952. Its totient is φ = 85554972.

The previous prime is 128332459. The next prime is 128332469. The reversal of 128332461 is 164233821.

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 not a de Polignac number, because 128332461 - 2¹ = 128332459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128332469) 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, 21388741 + ... + 21388746.

It is an arithmetic number, because the mean of its divisors is an integer number (42777488).

Almost surely, 2^128332461 is an apocalyptic number.

It is an amenable number.

128332461 is a deficient number, since it is larger than the sum of its proper divisors (42777491).

128332461 is an equidigital number, since it uses as much as digits as its factorization.

128332461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42777490.

The product of its digits is 6912, while the sum is 30.

The square root of 128332461 is about 11328.3918099614. The cubic root of 128332461 is about 504.4043704576.

The spelling of 128332461 in words is "one hundred twenty-eight million, three hundred thirty-two thousand, four hundred sixty-one".