123515015 has 8 divisors (see below), whose sum is σ = 159619488. Its totient is φ = 91211040.

The previous prime is 123515011. The next prime is 123515023. The reversal of 123515015 is 510515321.

It is a happy number.

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

It is not a de Polignac number, because 123515015 - 2² = 123515011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123515011) 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, 950051 + ... + 950180.

It is an arithmetic number, because the mean of its divisors is an integer number (19952436).

Almost surely, 2^123515015 is an apocalyptic number.

123515015 is a deficient number, since it is larger than the sum of its proper divisors (36104473).

123515015 is a wasteful number, since it uses less digits than its factorization.

123515015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900249.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 123515015 is about 11113.7309217022. The cubic root of 123515015 is about 498.0121271972.

The spelling of 123515015 in words is "one hundred twenty-three million, five hundred fifteen thousand, fifteen".