12503406 has 32 divisors (see below), whose sum is σ = 26732160. Its totient is φ = 3887136.

The previous prime is 12503371. The next prime is 12503417. The reversal of 12503406 is 60430521.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6820 + ... + 8456.

It is an arithmetic number, because the mean of its divisors is an integer number (835380).

Almost surely, 2^12503406 is an apocalyptic number.

12503406 is an abundant number, since it is smaller than the sum of its proper divisors (14228754).

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

12503406 is a wasteful number, since it uses less digits than its factorization.

12503406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 12503406 is about 3536.0155542644. The cubic root of 12503406 is about 232.1005187685.

Adding to 12503406 its reverse (60430521), we get a palindrome (72933927).

It can be divided in two parts, 1250 and 3406, that added together give a triangular number (4656 = T₉₆).

The spelling of 12503406 in words is "twelve million, five hundred three thousand, four hundred six".