123015020 has 24 divisors (see below), whose sum is σ = 259159824. Its totient is φ = 49048256.

The previous prime is 123015007. The next prime is 123015023. The reversal of 123015020 is 20510321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 123014986 and 123015004.

It is not an unprimeable number, because it can be changed into a prime (123015023) 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, 3362 + ... + 16041.

It is an arithmetic number, because the mean of its divisors is an integer number (10798326).

Almost surely, 2^123015020 is an apocalyptic number.

123015020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123015020 is an abundant number, since it is smaller than the sum of its proper divisors (136144804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123015020 is a wasteful number, since it uses less digits than its factorization.

123015020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19729 (or 19727 counting only the distinct ones).

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

The square root of 123015020 is about 11091.2136396339. The cubic root of 123015020 is about 497.3392256767.

Adding to 123015020 its reverse (20510321), we get a palindrome (143525341).

The spelling of 123015020 in words is "one hundred twenty-three million, fifteen thousand, twenty".