12510621 has 6 divisors (see below), whose sum is σ = 18070910. Its totient is φ = 8340408.

The previous prime is 12510613. The next prime is 12510649. The reversal of 12510621 is 12601521.

It can be written as a sum of positive squares in only one way, i.e., 10169721 + 2340900 = 3189^2 + 1530^2 .

It is not a de Polignac number, because 12510621 - 2³ = 12510613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12510594 and 12510603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12510611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 695026 + ... + 695043.

Almost surely, 2^12510621 is an apocalyptic number.

It is an amenable number.

12510621 is a deficient number, since it is larger than the sum of its proper divisors (5560289).

12510621 is a wasteful number, since it uses less digits than its factorization.

12510621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390075 (or 1390072 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 12510621 is about 3537.0356232303. The cubic root of 12510621 is about 232.1451541593.

It can be divided in two parts, 12510 and 621, that added together give a palindrome (13131).

The spelling of 12510621 in words is "twelve million, five hundred ten thousand, six hundred twenty-one".