402424202261 has 2 divisors, whose sum is σ = 402424202262. Its totient is φ = 402424202260.

The previous prime is 402424202237. The next prime is 402424202273. The reversal of 402424202261 is 162202424204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 402292090225 + 132112036 = 634265^2 + 11494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402424202261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402424202221) 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, 201212101130 + 201212101131.

It is an arithmetic number, because the mean of its divisors is an integer number (201212101131).

Almost surely, 2^402424202261 is an apocalyptic number.

It is an amenable number.

402424202261 is a deficient number, since it is larger than the sum of its proper divisors (1).

402424202261 is an equidigital number, since it uses as much as digits as its factorization.

402424202261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 402424202261 its reverse (162202424204), we get a palindrome (564626626465).

The spelling of 402424202261 in words is "four hundred two billion, four hundred twenty-four million, two hundred two thousand, two hundred sixty-one".