42564479 has 2 divisors, whose sum is σ = 42564480. Its totient is φ = 42564478.

The previous prime is 42564463. The next prime is 42564521. The reversal of 42564479 is 97446524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42564479 - 2⁴ = 42564463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42564409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21282239 + 21282240.

It is an arithmetic number, because the mean of its divisors is an integer number (21282240).

Almost surely, 2^42564479 is an apocalyptic number.

42564479 is a deficient number, since it is larger than the sum of its proper divisors (1).

42564479 is an equidigital number, since it uses as much as digits as its factorization.

42564479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 41.

The square root of 42564479 is about 6524.1458444765. The cubic root of 42564479 is about 349.1529967959.

The spelling of 42564479 in words is "forty-two million, five hundred sixty-four thousand, four hundred seventy-nine".