2543402 has 4 divisors (see below), whose sum is σ = 3815106. Its totient is φ = 1271700.

The previous prime is 2543399. The next prime is 2543413. The reversal of 2543402 is 2043452.

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., 1713481 + 829921 = 1309^2 + 911^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635849 + ... + 635852.

2^2543402 is an apocalyptic number.

2543402 is a deficient number, since it is larger than the sum of its proper divisors (1271704).

2543402 is a wasteful number, since it uses less digits than its factorization.

2543402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271703.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 2543402 is about 1594.8046902364. The cubic root of 2543402 is about 136.5017867531.

Adding to 2543402 its reverse (2043452), we get a palindrome (4586854).

The spelling of 2543402 in words is "two million, five hundred forty-three thousand, four hundred two".