402304481 has 2 divisors, whose sum is σ = 402304482. Its totient is φ = 402304480.

The previous prime is 402304471. The next prime is 402304489. The reversal of 402304481 is 184403204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280864081 + 121440400 = 16759^2 + 11020^2 .

It is a cyclic number.

It is not a de Polignac number, because 402304481 - 2¹⁴ = 402288097 is a prime.

It is a super-2 number, since 2×402304481² = 323697790865358722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402304481.

It is not a weakly prime, because it can be changed into another prime (402304489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201152240 + 201152241.

It is an arithmetic number, because the mean of its divisors is an integer number (201152241).

Almost surely, 2^402304481 is an apocalyptic number.

It is an amenable number.

402304481 is a deficient number, since it is larger than the sum of its proper divisors (1).

402304481 is an equidigital number, since it uses as much as digits as its factorization.

402304481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 402304481 is about 20057.5292845355. The cubic root of 402304481 is about 738.2185545270.

Adding to 402304481 its reverse (184403204), we get a palindrome (586707685).

The spelling of 402304481 in words is "four hundred two million, three hundred four thousand, four hundred eighty-one".