42240240401 has 2 divisors, whose sum is σ = 42240240402. Its totient is φ = 42240240400.

The previous prime is 42240240389. The next prime is 42240240421. The reversal of 42240240401 is 10404204224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35872360000 + 6367880401 = 189400^2 + 79799^2 .

It is a cyclic number.

It is not a de Polignac number, because 42240240401 - 2¹⁸ = 42239978257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42240240421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21120120200 + 21120120201.

It is an arithmetic number, because the mean of its divisors is an integer number (21120120201).

Almost surely, 2^42240240401 is an apocalyptic number.

It is an amenable number.

42240240401 is a deficient number, since it is larger than the sum of its proper divisors (1).

42240240401 is an equidigital number, since it uses as much as digits as its factorization.

42240240401 is an evil number, because the sum of its binary digits is even.

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

Adding to 42240240401 its reverse (10404204224), we get a palindrome (52644444625).

The spelling of 42240240401 in words is "forty-two billion, two hundred forty million, two hundred forty thousand, four hundred one".