6448531 has 2 divisors, whose sum is σ = 6448532. Its totient is φ = 6448530.

The previous prime is 6448529. The next prime is 6448537. The reversal of 6448531 is 1358446.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6448531 - 2¹ = 6448529 is a prime.

It is a super-2 number, since 2×6448531² = 83167104115922, which contains 22 as substring.

Together with 6448529, it forms a pair of twin primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6448493 and 6448502.

It is not a weakly prime, because it can be changed into another prime (6448537) 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, 3224265 + 3224266.

It is an arithmetic number, because the mean of its divisors is an integer number (3224266).

Almost surely, 2^6448531 is an apocalyptic number.

6448531 is a deficient number, since it is larger than the sum of its proper divisors (1).

6448531 is an equidigital number, since it uses as much as digits as its factorization.

6448531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 6448531 is about 2539.3957942786. The cubic root of 6448531 is about 186.1316657446.

It can be divided in two parts, 64485 and 31, that added together give a square (64516 = 254²).

The spelling of 6448531 in words is "six million, four hundred forty-eight thousand, five hundred thirty-one".