42515679 has 4 divisors (see below), whose sum is σ = 56687576. Its totient is φ = 28343784.

The previous prime is 42515639. The next prime is 42515713. The reversal of 42515679 is 97651524.

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

It is not a de Polignac number, because 42515679 - 2¹⁶ = 42450143 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42515609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7085944 + ... + 7085949.

It is an arithmetic number, because the mean of its divisors is an integer number (14171894).

Almost surely, 2^42515679 is an apocalyptic number.

42515679 is a deficient number, since it is larger than the sum of its proper divisors (14171897).

42515679 is a wasteful number, since it uses less digits than its factorization.

42515679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14171896.

The product of its digits is 75600, while the sum is 39.

The square root of 42515679 is about 6520.4048187210. The cubic root of 42515679 is about 349.0195116116.

The spelling of 42515679 in words is "forty-two million, five hundred fifteen thousand, six hundred seventy-nine".