128532407 has 2 divisors, whose sum is σ = 128532408. Its totient is φ = 128532406.

The previous prime is 128532311. The next prime is 128532409. The reversal of 128532407 is 704235821.

It is a strong prime.

It is an emirp because it is prime and its reverse (704235821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128532407 - 2²² = 124338103 is a prime.

Together with 128532409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128532409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64266203 + 64266204.

It is an arithmetic number, because the mean of its divisors is an integer number (64266204).

Almost surely, 2^128532407 is an apocalyptic number.

128532407 is a deficient number, since it is larger than the sum of its proper divisors (1).

128532407 is an equidigital number, since it uses as much as digits as its factorization.

128532407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 128532407 is about 11337.2133701364. The cubic root of 128532407 is about 504.6661938057. Note that the first 3 decimals are identical.

The spelling of 128532407 in words is "one hundred twenty-eight million, five hundred thirty-two thousand, four hundred seven".