6442481 has 2 divisors, whose sum is σ = 6442482. Its totient is φ = 6442480.

The previous prime is 6442459. The next prime is 6442493. The reversal of 6442481 is 1842446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6330256 + 112225 = 2516^2 + 335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6442481 is a prime.

It is a super-2 number, since 2×6442481² = 83011122870722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6442081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3221240 + 3221241.

It is an arithmetic number, because the mean of its divisors is an integer number (3221241).

Almost surely, 2^6442481 is an apocalyptic number.

It is an amenable number.

6442481 is a deficient number, since it is larger than the sum of its proper divisors (1).

6442481 is an equidigital number, since it uses as much as digits as its factorization.

6442481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 29.

The square root of 6442481 is about 2538.2042864986. The cubic root of 6442481 is about 186.0734380682.

It can be divided in two parts, 644 and 2481, that added together give a 5-th power (3125 = 5⁵).

The spelling of 6442481 in words is "six million, four hundred forty-two thousand, four hundred eighty-one".