402442361 has 2 divisors, whose sum is σ = 402442362. Its totient is φ = 402442360.

The previous prime is 402442319. The next prime is 402442379. The reversal of 402442361 is 163244204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291350761 + 111091600 = 17069^2 + 10540^2 .

It is a cyclic number.

It is not a de Polignac number, because 402442361 - 2⁶ = 402442297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402442361.

It is not a weakly prime, because it can be changed into another prime (402432361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201221180 + 201221181.

It is an arithmetic number, because the mean of its divisors is an integer number (201221181).

Almost surely, 2^402442361 is an apocalyptic number.

It is an amenable number.

402442361 is a deficient number, since it is larger than the sum of its proper divisors (1).

402442361 is an equidigital number, since it uses as much as digits as its factorization.

402442361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 402442361 is about 20060.9661033560. The cubic root of 402442361 is about 738.3028803326.

Adding to 402442361 its reverse (163244204), we get a palindrome (565686565).

The spelling of 402442361 in words is "four hundred two million, four hundred forty-two thousand, three hundred sixty-one".