42545513 has 4 divisors (see below), whose sum is σ = 42562128. Its totient is φ = 42528900.

The previous prime is 42545507. The next prime is 42545539. The reversal of 42545513 is 31554524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42545513 - 2⁴ = 42545497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42545593) 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, 3563 + ... + 9888.

It is an arithmetic number, because the mean of its divisors is an integer number (10640532).

Almost surely, 2^42545513 is an apocalyptic number.

It is an amenable number.

42545513 is a deficient number, since it is larger than the sum of its proper divisors (16615).

42545513 is a wasteful number, since it uses less digits than its factorization.

42545513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16614.

The product of its digits is 12000, while the sum is 29.

The square root of 42545513 is about 6522.6921589172. The cubic root of 42545513 is about 349.1011302342.

The spelling of 42545513 in words is "forty-two million, five hundred forty-five thousand, five hundred thirteen".