12420893 has 4 divisors (see below), whose sum is σ = 12428640. Its totient is φ = 12413148.

The previous prime is 12420887. The next prime is 12420917. The reversal of 12420893 is 39802421.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 39802421 = 1051 ⋅37871.

It is a cyclic number.

It is not a de Polignac number, because 12420893 - 2¹⁸ = 12158749 is a prime.

It is a super-3 number, since 3×12420893³ (a number of 22 digits) contains 333 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 (12420823) 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, 473 + ... + 5006.

It is an arithmetic number, because the mean of its divisors is an integer number (3107160).

Almost surely, 2^12420893 is an apocalyptic number.

It is an amenable number.

12420893 is a deficient number, since it is larger than the sum of its proper divisors (7747).

12420893 is an equidigital number, since it uses as much as digits as its factorization.

12420893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7746.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 12420893 is about 3524.3287304109. The cubic root of 12420893 is about 231.5888290395.

The spelling of 12420893 in words is "twelve million, four hundred twenty thousand, eight hundred ninety-three".