12505621 has 8 divisors (see below), whose sum is σ = 12729600. Its totient is φ = 12283440.

The previous prime is 12505613. The next prime is 12505627. The reversal of 12505621 is 12650521.

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

It is a cyclic number.

It is not a de Polignac number, because 12505621 - 2³ = 12505613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12505592 and 12505601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12505627) 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 7 ways as a sum of consecutive naturals, for example, 24315 + ... + 24823.

It is an arithmetic number, because the mean of its divisors is an integer number (1591200).

Almost surely, 2^12505621 is an apocalyptic number.

It is an amenable number.

12505621 is a deficient number, since it is larger than the sum of its proper divisors (223979).

12505621 is an equidigital number, since it uses as much as digits as its factorization.

12505621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 12505621 is about 3536.3287460303. The cubic root of 12505621 is about 232.1142236287.

The spelling of 12505621 in words is "twelve million, five hundred five thousand, six hundred twenty-one".