2543442 has 32 divisors (see below), whose sum is σ = 5624640. Its totient is φ = 760320.

The previous prime is 2543441. The next prime is 2543459. The reversal of 2543442 is 2443452.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2543441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5658 + ... + 6090.

It is an arithmetic number, because the mean of its divisors is an integer number (175770).

2^2543442 is an apocalyptic number.

2543442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2543442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2812320).

2543442 is an abundant number, since it is smaller than the sum of its proper divisors (3081198).

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

2543442 is a wasteful number, since it uses less digits than its factorization.

2543442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538.

The product of its digits is 3840, while the sum is 24.

The square root of 2543442 is about 1594.8172309077. The cubic root of 2543442 is about 136.5025023357.

Adding to 2543442 its reverse (2443452), we get a palindrome (4986894).

The spelling of 2543442 in words is "two million, five hundred forty-three thousand, four hundred forty-two".