42432557 has 2 divisors, whose sum is σ = 42432558. Its totient is φ = 42432556.

The previous prime is 42432503. The next prime is 42432589. The reversal of 42432557 is 75523424.

42432557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (42432589) can be obtained adding 42432557 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42432196 + 361 = 6514^2 + 19^2 .

It is a cyclic number.

It is not a de Polignac number, because 42432557 - 2¹⁰ = 42431533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42432457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21216278 + 21216279.

It is an arithmetic number, because the mean of its divisors is an integer number (21216279).

Almost surely, 2^42432557 is an apocalyptic number.

It is an amenable number.

42432557 is a deficient number, since it is larger than the sum of its proper divisors (1).

42432557 is an equidigital number, since it uses as much as digits as its factorization.

42432557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33600, while the sum is 32.

The square root of 42432557 is about 6514.0277094897. The cubic root of 42432557 is about 348.7919083085.

The spelling of 42432557 in words is "forty-two million, four hundred thirty-two thousand, five hundred fifty-seven".