42501215 has 16 divisors (see below), whose sum is σ = 52629696. Its totient is φ = 32928000.

The previous prime is 42501209. The next prime is 42501253. The reversal of 42501215 is 51210524.

It is not a de Polignac number, because 42501215 - 2⁸ = 42500959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 30269 + ... + 31641.

It is an arithmetic number, because the mean of its divisors is an integer number (3289356).

Almost surely, 2^42501215 is an apocalyptic number.

42501215 is a deficient number, since it is larger than the sum of its proper divisors (10128481).

42501215 is a wasteful number, since it uses less digits than its factorization.

42501215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 42501215 is about 6519.2955907828. The cubic root of 42501215 is about 348.9799278555.

Adding to 42501215 its reverse (51210524), we get a palindrome (93711739).

The spelling of 42501215 in words is "forty-two million, five hundred one thousand, two hundred fifteen".