402240042401 has 2 divisors, whose sum is σ = 402240042402. Its totient is φ = 402240042400.

The previous prime is 402240042199. The next prime is 402240042419. The reversal of 402240042401 is 104240042204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314076180625 + 88163861776 = 560425^2 + 296924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402240042401 is a prime.

It is not a weakly prime, because it can be changed into another prime (402240042601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201120021200 + 201120021201.

It is an arithmetic number, because the mean of its divisors is an integer number (201120021201).

Almost surely, 2^402240042401 is an apocalyptic number.

It is an amenable number.

402240042401 is a deficient number, since it is larger than the sum of its proper divisors (1).

402240042401 is an equidigital number, since it uses as much as digits as its factorization.

402240042401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 402240042401 its reverse (104240042204), we get a palindrome (506480084605).

The spelling of 402240042401 in words is "four hundred two billion, two hundred forty million, forty-two thousand, four hundred one".