2543557 has 8 divisors (see below), whose sum is σ = 2713176. Its totient is φ = 2376192.

The previous prime is 2543551. The next prime is 2543573. The reversal of 2543557 is 7553452.

It can be written as a sum of positive squares in 4 ways, for example, as 370881 + 2172676 = 609^2 + 1474^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2543557 - 2¹⁵ = 2510789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2193 + ... + 3145.

It is an arithmetic number, because the mean of its divisors is an integer number (339147).

2^2543557 is an apocalyptic number.

It is an amenable number.

2543557 is a deficient number, since it is larger than the sum of its proper divisors (169619).

2543557 is a wasteful number, since it uses less digits than its factorization.

2543557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127.

The product of its digits is 21000, while the sum is 31.

The square root of 2543557 is about 1594.8532847883. The cubic root of 2543557 is about 136.5045595940.

The spelling of 2543557 in words is "two million, five hundred forty-three thousand, five hundred fifty-seven".