12420402 has 8 divisors (see below), whose sum is σ = 24840816. Its totient is φ = 4140132.

The previous prime is 12420389. The next prime is 12420413. The reversal of 12420402 is 20402421.

12420402 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 a sphenic number, since it is the product of 3 distinct primes.

12420402 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1035028 + ... + 1035039.

It is an arithmetic number, because the mean of its divisors is an integer number (3105102).

Almost surely, 2^12420402 is an apocalyptic number.

12420402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12420402 is a wasteful number, since it uses less digits than its factorization.

12420402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2070072.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 12420402 is about 3524.2590710673. The cubic root of 12420402 is about 231.5857774174.

Adding to 12420402 its reverse (20402421), we get a palindrome (32822823).

The spelling of 12420402 in words is "twelve million, four hundred twenty thousand, four hundred two".