12420078 has 32 divisors (see below), whose sum is σ = 27250560. Its totient is φ = 3742560.

The previous prime is 12420059. The next prime is 12420097. The reversal of 12420078 is 87002421.

It is an interprime number because it is at equal distance from previous prime (12420059) and next prime (12420097).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14568 + ... + 15396.

It is an arithmetic number, because the mean of its divisors is an integer number (851580).

Almost surely, 2^12420078 is an apocalyptic number.

12420078 is an abundant number, since it is smaller than the sum of its proper divisors (14830482).

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

12420078 is a wasteful number, since it uses less digits than its factorization.

12420078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 12420078 is about 3524.2131036587. The cubic root of 12420078 is about 231.5837636757.

Adding to 12420078 its reverse (87002421), we get a palindrome (99422499).

It can be divided in two parts, 124 and 20078, that added together give a palindrome (20202).

The spelling of 12420078 in words is "twelve million, four hundred twenty thousand, seventy-eight".