12145422 has 8 divisors (see below), whose sum is σ = 24290856. Its totient is φ = 4048472.

The previous prime is 12145417. The next prime is 12145433. The reversal of 12145422 is 22454121.

12145422 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.

12145422 is an admirable number.

It is a super-2 number, since 2×12145422² = 295022551116168, which contains 22 as substring.

It is a congruent 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, 1012113 + ... + 1012124.

It is an arithmetic number, because the mean of its divisors is an integer number (3036357).

Almost surely, 2^12145422 is an apocalyptic number.

12145422 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.

12145422 is a wasteful number, since it uses less digits than its factorization.

12145422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024242.

The product of its digits is 640, while the sum is 21.

The square root of 12145422 is about 3485.0282638739. The cubic root of 12145422 is about 229.8639523083.

Adding to 12145422 its reverse (22454121), we get a palindrome (34599543).

The spelling of 12145422 in words is "twelve million, one hundred forty-five thousand, four hundred twenty-two".