123515012 has 12 divisors (see below), whose sum is σ = 217360080. Its totient is φ = 61412136.

The previous prime is 123515011. The next prime is 123515023. The reversal of 123515012 is 210515321.

It is a happy 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 3 ways as a sum of consecutive naturals, for example, 85538 + ... + 86969.

It is an arithmetic number, because the mean of its divisors is an integer number (18113340).

Almost surely, 2^123515012 is an apocalyptic number.

It is an amenable number.

123515012 is a deficient number, since it is larger than the sum of its proper divisors (93845068).

123515012 is a wasteful number, since it uses less digits than its factorization.

123515012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172690 (or 172688 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 123515012 is about 11113.7307867340. The cubic root of 123515012 is about 498.0121231652.

The spelling of 123515012 in words is "one hundred twenty-three million, five hundred fifteen thousand, twelve".