128424961 has 8 divisors (see below), whose sum is σ = 150185024. Its totient is φ = 107518320.

The previous prime is 128424949. The next prime is 128424973. The reversal of 128424961 is 169424821.

It is an interprime number because it is at equal distance from previous prime (128424949) and next prime (128424973).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128424961 - 2⁹ = 128424449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128424961.

It is not an unprimeable number, because it can be changed into a prime (128424911) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 213030 + ... + 213631.

It is an arithmetic number, because the mean of its divisors is an integer number (18773128).

Almost surely, 2^128424961 is an apocalyptic number.

It is an amenable number.

128424961 is a deficient number, since it is larger than the sum of its proper divisors (21760063).

128424961 is an equidigital number, since it uses as much as digits as its factorization.

128424961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426711.

The product of its digits is 27648, while the sum is 37.

The square root of 128424961 is about 11332.4737370091. The cubic root of 128424961 is about 504.5255302391.

The spelling of 128424961 in words is "one hundred twenty-eight million, four hundred twenty-four thousand, nine hundred sixty-one".