126015215 has 4 divisors (see below), whose sum is σ = 151218264. Its totient is φ = 100812168.

The previous prime is 126015167. The next prime is 126015257. The reversal of 126015215 is 512510621.

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 126015215 - 2⁶ = 126015151 is a prime.

It is a super-2 number, since 2×126015215² = 31759668822992450, which contains 22 as substring.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12601517 + ... + 12601526.

It is an arithmetic number, because the mean of its divisors is an integer number (37804566).

Almost surely, 2^126015215 is an apocalyptic number.

126015215 is a deficient number, since it is larger than the sum of its proper divisors (25203049).

126015215 is an equidigital number, since it uses as much as digits as its factorization.

126015215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25203048.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 126015215 is about 11225.6498698294. The cubic root of 126015215 is about 501.3499718716.

Adding to 126015215 its reverse (512510621), we get a palindrome (638525836).

The spelling of 126015215 in words is "one hundred twenty-six million, fifteen thousand, two hundred fifteen".