12245142 has 64 divisors (see below), whose sum is σ = 30933504. Its totient is φ = 3144960.

The previous prime is 12245119. The next prime is 12245143. The reversal of 12245142 is 24154221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12245143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22113 + ... + 22659.

It is an arithmetic number, because the mean of its divisors is an integer number (483336).

Almost surely, 2^12245142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12245142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15466752).

12245142 is an abundant number, since it is smaller than the sum of its proper divisors (18688362).

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

12245142 is a wasteful number, since it uses less digits than its factorization.

12245142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613.

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

The square root of 12245142 is about 3499.3059311812. The cubic root of 12245142 is about 230.4913377854.

Adding to 12245142 its reverse (24154221), we get a palindrome (36399363).

The spelling of 12245142 in words is "twelve million, two hundred forty-five thousand, one hundred forty-two".