42455587 has 2 divisors, whose sum is σ = 42455588. Its totient is φ = 42455586.

The previous prime is 42455551. The next prime is 42455593. The reversal of 42455587 is 78555424.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42455587 is a prime.

It is not a weakly prime, because it can be changed into another prime (42455527) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21227793 + 21227794.

It is an arithmetic number, because the mean of its divisors is an integer number (21227794).

Almost surely, 2^42455587 is an apocalyptic number.

42455587 is a deficient number, since it is larger than the sum of its proper divisors (1).

42455587 is an equidigital number, since it uses as much as digits as its factorization.

42455587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 224000, while the sum is 40.

The square root of 42455587 is about 6515.7951932209. The cubic root of 42455587 is about 348.8549984247.

The spelling of 42455587 in words is "forty-two million, four hundred fifty-five thousand, five hundred eighty-seven".