12548421 has 6 divisors (see below), whose sum is σ = 18125510. Its totient is φ = 8365608.

The previous prime is 12548413. The next prime is 12548423. The reversal of 12548421 is 12484521.

It can be written as a sum of positive squares in only one way, i.e., 11655396 + 893025 = 3414^2 + 945^2 .

It is not a de Polignac number, because 12548421 - 2³ = 12548413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12548423) 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, 697126 + ... + 697143.

Almost surely, 2^12548421 is an apocalyptic number.

It is an amenable number.

12548421 is a deficient number, since it is larger than the sum of its proper divisors (5577089).

12548421 is a wasteful number, since it uses less digits than its factorization.

12548421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394275 (or 1394272 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 12548421 is about 3542.3750507251. The cubic root of 12548421 is about 232.3787227369.

The spelling of 12548421 in words is "twelve million, five hundred forty-eight thousand, four hundred twenty-one".