2015123 has 8 divisors (see below), whose sum is σ = 2274480. Its totient is φ = 1768480.

The previous prime is 2015107. The next prime is 2015141. The reversal of 2015123 is 3215102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2015123 - 2⁴ = 2015107 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2015098 and 2015107.

It is not an unprimeable number, because it can be changed into a prime (2015183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2840 + ... + 3477.

It is an arithmetic number, because the mean of its divisors is an integer number (284310).

2^2015123 is an apocalyptic number.

2015123 is a deficient number, since it is larger than the sum of its proper divisors (259357).

2015123 is a wasteful number, since it uses less digits than its factorization.

2015123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6357.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 2015123 is about 1419.5502808988. The cubic root of 2015123 is about 126.3088710179.

The spelling of 2015123 in words is "two million, fifteen thousand, one hundred twenty-three".