2142444 has 12 divisors (see below), whose sum is σ = 4999064. Its totient is φ = 714144.

The previous prime is 2142431. The next prime is 2142449. The reversal of 2142444 is 4442412.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2142444.

It is not an unprimeable number, because it can be changed into a prime (2142449) 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, 89257 + ... + 89280.

2^2142444 is an apocalyptic number.

It is an amenable number.

2142444 is an abundant number, since it is smaller than the sum of its proper divisors (2856620).

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

2142444 is a wasteful number, since it uses less digits than its factorization.

2142444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178544 (or 178542 counting only the distinct ones).

The product of its digits is 1024, while the sum is 21.

The square root of 2142444 is about 1463.7089874698. The cubic root of 2142444 is about 128.9149129421.

Adding to 2142444 its reverse (4442412), we get a palindrome (6584856).

Subtracting 2142444 from its reverse (4442412), we obtain a cube (2299968 = 132³).

The spelling of 2142444 in words is "two million, one hundred forty-two thousand, four hundred forty-four".