855432001 has 2 divisors, whose sum is σ = 855432002. Its totient is φ = 855432000.

The previous prime is 855431999. The next prime is 855432029. The reversal of 855432001 is 100234558.

It is an a-pointer prime, because the next prime (855432029) can be obtained adding 855432001 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 734410000 + 121022001 = 27100^2 + 11001^2 .

It is a cyclic number.

It is not a de Polignac number, because 855432001 - 2¹ = 855431999 is a prime.

Together with 855431999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (855432301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427716000 + 427716001.

It is an arithmetic number, because the mean of its divisors is an integer number (427716001).

Almost surely, 2^855432001 is an apocalyptic number.

It is an amenable number.

855432001 is a deficient number, since it is larger than the sum of its proper divisors (1).

855432001 is an equidigital number, since it uses as much as digits as its factorization.

855432001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 855432001 is about 29247.7691627926. The cubic root of 855432001 is about 949.2818213835.

Adding to 855432001 its reverse (100234558), we get a palindrome (955666559).

The spelling of 855432001 in words is "eight hundred fifty-five million, four hundred thirty-two thousand, one".