12700421 has 4 divisors (see below), whose sum is σ = 13110144. Its totient is φ = 12290700.

The previous prime is 12700397. The next prime is 12700451. The reversal of 12700421 is 12400721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12700421 - 2¹⁰ = 12699397 is a prime.

It is a super-2 number, since 2×12700421² = 322601387154482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12700421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12700451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204815 + ... + 204876.

It is an arithmetic number, because the mean of its divisors is an integer number (3277536).

Almost surely, 2^12700421 is an apocalyptic number.

It is an amenable number.

12700421 is a deficient number, since it is larger than the sum of its proper divisors (409723).

12700421 is an equidigital number, since it uses as much as digits as its factorization.

12700421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409722.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 12700421 is about 3563.7650034760. The cubic root of 12700421 is about 233.3132334160.

The spelling of 12700421 in words is "twelve million, seven hundred thousand, four hundred twenty-one".