424721641 has 2 divisors, whose sum is σ = 424721642. Its totient is φ = 424721640.

The previous prime is 424721639. The next prime is 424721677. The reversal of 424721641 is 146127424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260984025 + 163737616 = 16155^2 + 12796^2 .

It is a cyclic number.

It is not a de Polignac number, because 424721641 - 2¹ = 424721639 is a prime.

Together with 424721639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (424721441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212360820 + 212360821.

It is an arithmetic number, because the mean of its divisors is an integer number (212360821).

Almost surely, 2^424721641 is an apocalyptic number.

It is an amenable number.

424721641 is a deficient number, since it is larger than the sum of its proper divisors (1).

424721641 is an equidigital number, since it uses as much as digits as its factorization.

424721641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 31.

The square root of 424721641 is about 20608.7758248762. The cubic root of 424721641 is about 751.6831183616.

The spelling of 424721641 in words is "four hundred twenty-four million, seven hundred twenty-one thousand, six hundred forty-one".