42502515 has 16 divisors (see below), whose sum is σ = 74186496. Its totient is φ = 20607200.

The previous prime is 42502513. The next prime is 42502541. The reversal of 42502515 is 51520524.

It is a happy number.

It is not a de Polignac number, because 42502515 - 2¹ = 42502513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42502511) 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 15 ways as a sum of consecutive naturals, for example, 128631 + ... + 128960.

It is an arithmetic number, because the mean of its divisors is an integer number (4636656).

Almost surely, 2^42502515 is an apocalyptic number.

42502515 is a deficient number, since it is larger than the sum of its proper divisors (31683981).

42502515 is a wasteful number, since it uses less digits than its factorization.

42502515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257610.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 42502515 is about 6519.3952940438. The cubic root of 42502515 is about 348.9834859442.

Subtracting 42502515 from its reverse (51520524), we obtain a square (9018009 = 3003²).

The spelling of 42502515 in words is "forty-two million, five hundred two thousand, five hundred fifteen".