642483481 has 2 divisors, whose sum is σ = 642483482. Its totient is φ = 642483480.

The previous prime is 642483451. The next prime is 642483493. The reversal of 642483481 is 184384246.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 632774025 + 9709456 = 25155^2 + 3116^2 .

It is a cyclic number.

It is not a de Polignac number, because 642483481 - 2⁷ = 642483353 is a prime.

It is a super-2 number, since 2×642483481² = 825570046715754722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (642483451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321241740 + 321241741.

It is an arithmetic number, because the mean of its divisors is an integer number (321241741).

Almost surely, 2^642483481 is an apocalyptic number.

It is an amenable number.

642483481 is a deficient number, since it is larger than the sum of its proper divisors (1).

642483481 is an equidigital number, since it uses as much as digits as its factorization.

642483481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 147456, while the sum is 40.

The square root of 642483481 is about 25347.2578595792. The cubic root of 642483481 is about 862.8871242919.

The spelling of 642483481 in words is "six hundred forty-two million, four hundred eighty-three thousand, four hundred eighty-one".