12144621 has 32 divisors (see below), whose sum is σ = 17860608. Its totient is φ = 7318080.

The previous prime is 12144593. The next prime is 12144623. The reversal of 12144621 is 12644121.

It is a happy number.

12144621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12144621 - 2⁵ = 12144589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12144623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171016 + ... + 171086.

It is an arithmetic number, because the mean of its divisors is an integer number (558144).

Almost surely, 2^12144621 is an apocalyptic number.

It is an amenable number.

12144621 is a deficient number, since it is larger than the sum of its proper divisors (5715987).

12144621 is a wasteful number, since it uses less digits than its factorization.

12144621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201.

The product of its digits is 384, while the sum is 21.

The square root of 12144621 is about 3484.9133418207. The cubic root of 12144621 is about 229.8588989619.

Adding to 12144621 its reverse (12644121), we get a palindrome (24788742).

Subtracting 12144621 from its reverse (12644121), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 12144621 in words is "twelve million, one hundred forty-four thousand, six hundred twenty-one".