126216015 has 16 divisors (see below), whose sum is σ = 205257696. Its totient is φ = 66211200.

The previous prime is 126216001. The next prime is 126216037. The reversal of 126216015 is 510612621.

It is not a de Polignac number, because 126216015 - 2⁶ = 126215951 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68056 + ... + 69885.

It is an arithmetic number, because the mean of its divisors is an integer number (12828606).

Almost surely, 2^126216015 is an apocalyptic number.

126216015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

126216015 is a deficient number, since it is larger than the sum of its proper divisors (79041681).

126216015 is a wasteful number, since it uses less digits than its factorization.

126216015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138010.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 126216015 is about 11234.5901126832. The cubic root of 126216015 is about 501.6161239917.

Adding to 126216015 its reverse (510612621), we get a palindrome (636828636).

The spelling of 126216015 in words is "one hundred twenty-six million, two hundred sixteen thousand, fifteen".