12420243 has 64 divisors (see below), whose sum is σ = 22118400. Its totient is φ = 6804000.

The previous prime is 12420229. The next prime is 12420257. The reversal of 12420243 is 34202421.

12420243 is a `hidden beast` number, since 1 + 2 + 420 + 243 = 666.

12420243 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12420229) and next prime (12420257).

It is not a de Polignac number, because 12420243 - 2⁴ = 12420227 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420263) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 174898 + ... + 174968.

It is an arithmetic number, because the mean of its divisors is an integer number (345600).

Almost surely, 2^12420243 is an apocalyptic number.

12420243 is a deficient number, since it is larger than the sum of its proper divisors (9698157).

12420243 is a wasteful number, since it uses less digits than its factorization.

12420243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 12420243 is about 3524.2365130621. The cubic root of 12420243 is about 231.5847891967.

Adding to 12420243 its reverse (34202421), we get a palindrome (46622664).

The spelling of 12420243 in words is "twelve million, four hundred twenty thousand, two hundred forty-three".