2015126243 has 16 divisors (see below), whose sum is σ = 2234845536. Its totient is φ = 1805207040.

The previous prime is 2015126173. The next prime is 2015126279. The reversal of 2015126243 is 3426215102.

It is a happy number.

It is not a de Polignac number, because 2015126243 - 2¹⁰ = 2015125219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2015426243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76283 + ... + 99243.

It is an arithmetic number, because the mean of its divisors is an integer number (139677846).

Almost surely, 2^2015126243 is an apocalyptic number.

2015126243 is a deficient number, since it is larger than the sum of its proper divisors (219719293).

2015126243 is a wasteful number, since it uses less digits than its factorization.

2015126243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23174.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 2015126243 is about 44890.1575292402. The cubic root of 2015126243 is about 1263.0893877544.

The spelling of 2015126243 in words is "two billion, fifteen million, one hundred twenty-six thousand, two hundred forty-three".