402422401 has 2 divisors, whose sum is σ = 402422402. Its totient is φ = 402422400.

The previous prime is 402422389. The next prime is 402422411. The reversal of 402422401 is 104224204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 332114176 + 70308225 = 18224^2 + 8385^2 .

It is a cyclic number.

It is not a de Polignac number, because 402422401 - 2¹³ = 402414209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (402422411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201211200 + 201211201.

It is an arithmetic number, because the mean of its divisors is an integer number (201211201).

Almost surely, 2^402422401 is an apocalyptic number.

It is an amenable number.

402422401 is a deficient number, since it is larger than the sum of its proper divisors (1).

402422401 is an equidigital number, since it uses as much as digits as its factorization.

402422401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 402422401 is about 20060.4686136690. The cubic root of 402422401 is about 738.2906742210.

Adding to 402422401 its reverse (104224204), we get a palindrome (506646605).

The spelling of 402422401 in words is "four hundred two million, four hundred twenty-two thousand, four hundred one".