402424243261 has 2 divisors, whose sum is σ = 402424243262. Its totient is φ = 402424243260.

The previous prime is 402424243241. The next prime is 402424243339. The reversal of 402424243261 is 162342424204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 402185540761 + 238702500 = 634181^2 + 15450^2 .

It is a cyclic number.

It is not a de Polignac number, because 402424243261 - 2²⁹ = 401887372349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402424243211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201212121630 + 201212121631.

It is an arithmetic number, because the mean of its divisors is an integer number (201212121631).

Almost surely, 2^402424243261 is an apocalyptic number.

It is an amenable number.

402424243261 is a deficient number, since it is larger than the sum of its proper divisors (1).

402424243261 is an equidigital number, since it uses as much as digits as its factorization.

402424243261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 402424243261 its reverse (162342424204), we get a palindrome (564766667465).

The spelling of 402424243261 in words is "four hundred two billion, four hundred twenty-four million, two hundred forty-three thousand, two hundred sixty-one".