12420434 has 16 divisors (see below), whose sum is σ = 20122368. Its totient is φ = 5715792.

The previous prime is 12420413. The next prime is 12420451. The reversal of 12420434 is 43402421.

12420434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15389 + ... + 16175.

It is an arithmetic number, because the mean of its divisors is an integer number (1257648).

Almost surely, 2^12420434 is an apocalyptic number.

12420434 is a deficient number, since it is larger than the sum of its proper divisors (7701934).

12420434 is a wasteful number, since it uses less digits than its factorization.

12420434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 12420434 is about 3524.2636110257. The cubic root of 12420434 is about 231.5859763036.

Adding to 12420434 its reverse (43402421), we get a palindrome (55822855).

The spelling of 12420434 in words is "twelve million, four hundred twenty thousand, four hundred thirty-four".