12503621 has 4 divisors (see below), whose sum is σ = 13465452. Its totient is φ = 11541792.

The previous prime is 12503609. The next prime is 12503641. The reversal of 12503621 is 12630521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2070721 + 10432900 = 1439^2 + 3230^2 .

It is a cyclic number.

It is not a de Polignac number, because 12503621 - 2¹⁰ = 12502597 is a prime.

It is a super-2 number, since 2×12503621² = 312681076223282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12503593 and 12503602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12503641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480896 + ... + 480921.

It is an arithmetic number, because the mean of its divisors is an integer number (3366363).

Almost surely, 2^12503621 is an apocalyptic number.

It is an amenable number.

12503621 is a deficient number, since it is larger than the sum of its proper divisors (961831).

12503621 is an equidigital number, since it uses as much as digits as its factorization.

12503621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961830.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 12503621 is about 3536.0459555837. The cubic root of 12503621 is about 232.1018491080.

The spelling of 12503621 in words is "twelve million, five hundred three thousand, six hundred twenty-one".