42515615 has 16 divisors (see below), whose sum is σ = 53569728. Its totient is φ = 32330496.

The previous prime is 42515609. The next prime is 42515639. The reversal of 42515615 is 51651524.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42515615 - 2⁸ = 42515359 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 15 ways as a sum of consecutive naturals, for example, 18827 + ... + 20963.

It is an arithmetic number, because the mean of its divisors is an integer number (3348108).

Almost surely, 2^42515615 is an apocalyptic number.

42515615 is a deficient number, since it is larger than the sum of its proper divisors (11054113).

42515615 is a wasteful number, since it uses less digits than its factorization.

42515615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338.

The product of its digits is 6000, while the sum is 29.

The square root of 42515615 is about 6520.3999110484. The cubic root of 42515615 is about 349.0193364820.

The spelling of 42515615 in words is "forty-two million, five hundred fifteen thousand, six hundred fifteen".