42502415 has 4 divisors (see below), whose sum is σ = 51002904. Its totient is φ = 34001928.

The previous prime is 42502387. The next prime is 42502417. The reversal of 42502415 is 51420524.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42502415 - 2¹⁸ = 42240271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42502417) 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, 4250237 + ... + 4250246.

It is an arithmetic number, because the mean of its divisors is an integer number (12750726).

Almost surely, 2^42502415 is an apocalyptic number.

42502415 is a deficient number, since it is larger than the sum of its proper divisors (8500489).

42502415 is an equidigital number, since it uses as much as digits as its factorization.

42502415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8500488.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 42502415 is about 6519.3876246163. The cubic root of 42502415 is about 348.9832122477.

Adding to 42502415 its reverse (51420524), we get a palindrome (93922939).

The spelling of 42502415 in words is "forty-two million, five hundred two thousand, four hundred fifteen".