12503121 has 8 divisors (see below), whose sum is σ = 17548320. Its totient is φ = 7896672.

The previous prime is 12503059. The next prime is 12503131. The reversal of 12503121 is 12130521.

12503121 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12503121 - 2⁷ = 12502993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12503121.

It is not an unprimeable number, because it can be changed into a prime (12503131) 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, 109620 + ... + 109733.

It is an arithmetic number, because the mean of its divisors is an integer number (2193540).

Almost surely, 2^12503121 is an apocalyptic number.

It is an amenable number.

12503121 is a deficient number, since it is larger than the sum of its proper divisors (5045199).

12503121 is a wasteful number, since it uses less digits than its factorization.

12503121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219375.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 12503121 is about 3535.9752544383. The cubic root of 12503121 is about 232.0987552717.

Adding to 12503121 its reverse (12130521), we get a palindrome (24633642).

It can be divided in two parts, 1250 and 3121, that added together give a triangular number (4371 = T₉₃).

The spelling of 12503121 in words is "twelve million, five hundred three thousand, one hundred twenty-one".