42023560421 has 2 divisors, whose sum is σ = 42023560422. Its totient is φ = 42023560420.

The previous prime is 42023560393. The next prime is 42023560487. The reversal of 42023560421 is 12406532024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38421880225 + 3601680196 = 196015^2 + 60014^2 .

It is a cyclic number.

It is not a de Polignac number, because 42023560421 - 2²⁶ = 41956451557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42023560021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21011780210 + 21011780211.

It is an arithmetic number, because the mean of its divisors is an integer number (21011780211).

Almost surely, 2^42023560421 is an apocalyptic number.

It is an amenable number.

42023560421 is a deficient number, since it is larger than the sum of its proper divisors (1).

42023560421 is an equidigital number, since it uses as much as digits as its factorization.

42023560421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 29.

The spelling of 42023560421 in words is "forty-two billion, twenty-three million, five hundred sixty thousand, four hundred twenty-one".