42456487 has 2 divisors, whose sum is σ = 42456488. Its totient is φ = 42456486.

The previous prime is 42456467. The next prime is 42456503. The reversal of 42456487 is 78465424.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42456487 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42456457) 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, 21228243 + 21228244.

It is an arithmetic number, because the mean of its divisors is an integer number (21228244).

Almost surely, 2^42456487 is an apocalyptic number.

42456487 is a deficient number, since it is larger than the sum of its proper divisors (1).

42456487 is an equidigital number, since it uses as much as digits as its factorization.

42456487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 40.

The square root of 42456487 is about 6515.8642557991. The cubic root of 42456487 is about 348.8574634892.

The spelling of 42456487 in words is "forty-two million, four hundred fifty-six thousand, four hundred eighty-seven".