42505615 has 4 divisors (see below), whose sum is σ = 51006744. Its totient is φ = 34004488.

The previous prime is 42505609. The next prime is 42505621. The reversal of 42505615 is 51650524.

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

It is an interprime number because it is at equal distance from previous prime (42505609) and next prime (42505621).

It is a cyclic number.

It is not a de Polignac number, because 42505615 - 2⁹ = 42505103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4250557 + ... + 4250566.

It is an arithmetic number, because the mean of its divisors is an integer number (12751686).

Almost surely, 2^42505615 is an apocalyptic number.

42505615 is a deficient number, since it is larger than the sum of its proper divisors (8501129).

42505615 is an equidigital number, since it uses as much as digits as its factorization.

42505615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8501128.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 42505615 is about 6519.6330418207. The cubic root of 42505615 is about 348.9919703245.

The spelling of 42505615 in words is "forty-two million, five hundred five thousand, six hundred fifteen".