42520663 has 4 divisors (see below), whose sum is σ = 42551968. Its totient is φ = 42489360.

The previous prime is 42520661. The next prime is 42520691. The reversal of 42520663 is 36602524.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42520663 - 2¹ = 42520661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42520661) 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 in 3 ways as a sum of consecutive naturals, for example, 13518 + ... + 16363.

It is an arithmetic number, because the mean of its divisors is an integer number (10637992).

Almost surely, 2^42520663 is an apocalyptic number.

42520663 is a deficient number, since it is larger than the sum of its proper divisors (31305).

42520663 is a wasteful number, since it uses less digits than its factorization.

42520663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31304.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 42520663 is about 6520.7869923806. The cubic root of 42520663 is about 349.0331492884.

The spelling of 42520663 in words is "forty-two million, five hundred twenty thousand, six hundred sixty-three".