12405020 has 12 divisors (see below), whose sum is σ = 26050584. Its totient is φ = 4962000.

The previous prime is 12405013. The next prime is 12405023. The reversal of 12405020 is 2050421.

12405020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12404986 and 12405004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12405023) 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, 310106 + ... + 310145.

It is an arithmetic number, because the mean of its divisors is an integer number (2170882).

Almost surely, 2^12405020 is an apocalyptic number.

12405020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12405020 is an abundant number, since it is smaller than the sum of its proper divisors (13645564).

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

12405020 is a wasteful number, since it uses less digits than its factorization.

12405020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620260 (or 620258 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 12405020 is about 3522.0760923069. The cubic root of 12405020 is about 231.4901357468.

Adding to 12405020 its reverse (2050421), we get a palindrome (14455441).

The spelling of 12405020 in words is "twelve million, four hundred five thousand, twenty".