12702421 has 4 divisors (see below), whose sum is σ = 12728992. Its totient is φ = 12675852.

The previous prime is 12702419. The next prime is 12702439. The reversal of 12702421 is 12420721.

It is a happy number.

12702421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12702421 - 2¹ = 12702419 is a prime.

It is a super-2 number, since 2×12702421² = 322702998522482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12702491) 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, 12555 + ... + 13528.

It is an arithmetic number, because the mean of its divisors is an integer number (3182248).

Almost surely, 2^12702421 is an apocalyptic number.

It is an amenable number.

12702421 is a deficient number, since it is larger than the sum of its proper divisors (26571).

12702421 is an equidigital number, since it uses as much as digits as its factorization.

12702421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26570.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12702421 is about 3564.0455945456. The cubic root of 12702421 is about 233.3254797810.

The spelling of 12702421 in words is "twelve million, seven hundred two thousand, four hundred twenty-one".