12546621 has 12 divisors (see below), whose sum is σ = 18394272. Its totient is φ = 8239176.

The previous prime is 12546619. The next prime is 12546643. The reversal of 12546621 is 12664521.

It is not a de Polignac number, because 12546621 - 2¹ = 12546619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12546421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9801 + ... + 11006.

It is an arithmetic number, because the mean of its divisors is an integer number (1532856).

Almost surely, 2^12546621 is an apocalyptic number.

It is an amenable number.

12546621 is a deficient number, since it is larger than the sum of its proper divisors (5847651).

12546621 is a wasteful number, since it uses less digits than its factorization.

12546621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20880 (or 20877 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 12546621 is about 3542.1209747833. The cubic root of 12546621 is about 232.3676110678.

It can be divided in two parts, 1254 and 6621, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 12546621 in words is "twelve million, five hundred forty-six thousand, six hundred twenty-one".