42558377 has 2 divisors, whose sum is σ = 42558378. Its totient is φ = 42558376.

The previous prime is 42558371. The next prime is 42558379. The reversal of 42558377 is 77385524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21864976 + 20693401 = 4676^2 + 4549^2 .

It is a cyclic number.

It is not a de Polignac number, because 42558377 - 2¹⁰ = 42557353 is a prime.

It is a super-2 number, since 2×42558377² = 3622430905748258, which contains 22 as substring.

Together with 42558379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42558371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21279188 + 21279189.

It is an arithmetic number, because the mean of its divisors is an integer number (21279189).

Almost surely, 2^42558377 is an apocalyptic number.

It is an amenable number.

42558377 is a deficient number, since it is larger than the sum of its proper divisors (1).

42558377 is an equidigital number, since it uses as much as digits as its factorization.

42558377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 235200, while the sum is 41.

The square root of 42558377 is about 6523.6781802906. The cubic root of 42558377 is about 349.1363112602.

The spelling of 42558377 in words is "forty-two million, five hundred fifty-eight thousand, three hundred seventy-seven".