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12143444 = 223197931
BaseRepresentation
bin101110010100…
…101101010100
3211211221200012
4232110231110
511102042234
61112135352
7205134425
oct56245524
924757605
1012143444
116944605
124097558
132692391
14188164c
1510ed0ce
hexb94b54

12143444 has 12 divisors (see below), whose sum is σ = 21936768. Its totient is φ = 5875800.

The previous prime is 12143441. The next prime is 12143447. The reversal of 12143444 is 44434121.

It is a happy number.

12143444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12143441) and next prime (12143447).

It is a super-2 number, since 2×121434442 = 294926464362272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48842 + ... + 49089.

It is an arithmetic number, because the mean of its divisors is an integer number (1828064).

Almost surely, 212143444 is an apocalyptic number.

It is an amenable number.

12143444 is a deficient number, since it is larger than the sum of its proper divisors (9793324).

12143444 is a wasteful number, since it uses less digits than its factorization.

12143444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97966 (or 97964 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 12143444 is about 3484.7444669588. The cubic root of 12143444 is about 229.8514731047.

Adding to 12143444 its reverse (44434121), we get a palindrome (56577565).

The spelling of 12143444 in words is "twelve million, one hundred forty-three thousand, four hundred forty-four".

Divisors: 1 2 4 31 62 124 97931 195862 391724 3035861 6071722 12143444