42043434401 has 2 divisors, whose sum is σ = 42043434402. Its totient is φ = 42043434400.

The previous prime is 42043434331. The next prime is 42043434431. The reversal of 42043434401 is 10443434024.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28274758801 + 13768675600 = 168151^2 + 117340^2 .

It is a cyclic number.

It is not a de Polignac number, because 42043434401 - 2¹⁸ = 42043172257 is a prime.

It is not a weakly prime, because it can be changed into another prime (42043434431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21021717200 + 21021717201.

It is an arithmetic number, because the mean of its divisors is an integer number (21021717201).

Almost surely, 2^42043434401 is an apocalyptic number.

It is an amenable number.

42043434401 is a deficient number, since it is larger than the sum of its proper divisors (1).

42043434401 is an equidigital number, since it uses as much as digits as its factorization.

42043434401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 42043434401 its reverse (10443434024), we get a palindrome (52486868425).

The spelling of 42043434401 in words is "forty-two billion, forty-three million, four hundred thirty-four thousand, four hundred one".