64451 has 2 divisors, whose sum is σ = 64452. Its totient is φ = 64450.

The previous prime is 64439. The next prime is 64453. The reversal of 64451 is 15446.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64451 is a prime.

It is a Sophie Germain prime.

Together with 64453, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (64453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32225 + 32226.

It is an arithmetic number, because the mean of its divisors is an integer number (32226).

2⁶⁴⁴⁵¹ is an apocalyptic number.

64451 is a deficient number, since it is larger than the sum of its proper divisors (1).

64451 is an equidigital number, since it uses as much as digits as its factorization.

64451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 20.

The square root of 64451 is about 253.8720149997. The cubic root of 64451 is about 40.0937384891.

Adding to 64451 its reverse (15446), we get a palindrome (79897).

It can be divided in two parts, 6445 and 1, that added together give a palindrome (6446).

The spelling of 64451 in words is "sixty-four thousand, four hundred fifty-one".