2543434 has 4 divisors (see below), whose sum is σ = 3815154. Its totient is φ = 1271716.

The previous prime is 2543423. The next prime is 2543441. The reversal of 2543434 is 4343452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2117025 + 426409 = 1455^2 + 653^2 .

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2543399 and 2543408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635857 + ... + 635860.

2^2543434 is an apocalyptic number.

2543434 is a deficient number, since it is larger than the sum of its proper divisors (1271720).

2543434 is a wasteful number, since it uses less digits than its factorization.

2543434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271719.

The product of its digits is 5760, while the sum is 25.

The square root of 2543434 is about 1594.8147227813. The cubic root of 2543434 is about 136.5023592198.

Adding to 2543434 its reverse (4343452), we get a palindrome (6886886).

The spelling of 2543434 in words is "two million, five hundred forty-three thousand, four hundred thirty-four".