12506420 has 24 divisors (see below), whose sum is σ = 26331648. Its totient is φ = 4989600.

The previous prime is 12506401. The next prime is 12506447. The reversal of 12506420 is 2460521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12506392 and 12506401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12125 + ... + 13115.

It is an arithmetic number, because the mean of its divisors is an integer number (1097152).

Almost surely, 2^12506420 is an apocalyptic number.

12506420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12506420 is an abundant number, since it is smaller than the sum of its proper divisors (13825228).

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

12506420 is a wasteful number, since it uses less digits than its factorization.

12506420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631 (or 1629 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 12506420 is about 3536.4417144921. The cubic root of 12506420 is about 232.1191668809.

Adding to 12506420 its reverse (2460521), we get a palindrome (14966941).

The spelling of 12506420 in words is "twelve million, five hundred six thousand, four hundred twenty".