12420541 has 4 divisors (see below), whose sum is σ = 14194912. Its totient is φ = 10646172.

The previous prime is 12420521. The next prime is 12420571. The reversal of 12420541 is 14502421.

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 an emirpimes, since its reverse is a distinct semiprime: 14502421 = 1259 ⋅11519.

It is a cyclic number.

It is not a de Polignac number, because 12420541 - 2⁷ = 12420413 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 (12420511) 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, 887175 + ... + 887188.

It is an arithmetic number, because the mean of its divisors is an integer number (3548728).

Almost surely, 2^12420541 is an apocalyptic number.

It is an amenable number.

12420541 is a deficient number, since it is larger than the sum of its proper divisors (1774371).

12420541 is an equidigital number, since it uses as much as digits as its factorization.

12420541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774370.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 12420541 is about 3524.2787914693. The cubic root of 12420541 is about 231.5866413268.

Adding to 12420541 its reverse (14502421), we get a palindrome (26922962).

The spelling of 12420541 in words is "twelve million, four hundred twenty thousand, five hundred forty-one".