42558493 has 2 divisors, whose sum is σ = 42558494. Its totient is φ = 42558492.

The previous prime is 42558449. The next prime is 42558517. The reversal of 42558493 is 39485524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26853124 + 15705369 = 5182^2 + 3963^2 .

It is a cyclic number.

It is not a de Polignac number, because 42558493 - 2¹⁷ = 42427421 is a prime.

It is a super-2 number, since 2×42558493² = 3622450652862098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42558403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21279246 + 21279247.

It is an arithmetic number, because the mean of its divisors is an integer number (21279247).

Almost surely, 2^42558493 is an apocalyptic number.

It is an amenable number.

42558493 is a deficient number, since it is larger than the sum of its proper divisors (1).

42558493 is an equidigital number, since it uses as much as digits as its factorization.

42558493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 40.

The square root of 42558493 is about 6523.6870709745. The cubic root of 42558493 is about 349.1366284698.

The spelling of 42558493 in words is "forty-two million, five hundred fifty-eight thousand, four hundred ninety-three".