2143242 has 12 divisors (see below), whose sum is σ = 4643730. Its totient is φ = 714408.

The previous prime is 2143231. The next prime is 2143243. The reversal of 2143242 is 2423412.

It can be written as a sum of positive squares in only one way, i.e., 2047761 + 95481 = 1431^2 + 309^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 119069 = 2143242 / (2 + 1 + 4 + 3 + 2 + 4 + 2).

It is a d-powerful number, because it can be written as 2¹³ + 1 + 4⁵ + 3² + 2¹⁵ + 4⁶ + 2²¹ .

It is not an unprimeable number, because it can be changed into a prime (2143243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59517 + ... + 59552.

2^2143242 is an apocalyptic number.

2143242 is an abundant number, since it is smaller than the sum of its proper divisors (2500488).

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

2143242 is a wasteful number, since it uses less digits than its factorization.

2143242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119077 (or 119074 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 2143242 is about 1463.9815572609. The cubic root of 2143242 is about 128.9309166791.

Adding to 2143242 its reverse (2423412), we get a palindrome (4566654).

The spelling of 2143242 in words is "two million, one hundred forty-three thousand, two hundred forty-two".