2563541 has 4 divisors (see below), whose sum is σ = 2598732. Its totient is φ = 2528352.

The previous prime is 2563523. The next prime is 2563543. The reversal of 2563541 is 1453652.

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

It can be written as a sum of positive squares in 2 ways, for example, as 461041 + 2102500 = 679^2 + 1450^2 .

It is a cyclic number.

It is not a de Polignac number, because 2563541 - 2¹⁰ = 2562517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2563541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563543) 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 3 ways as a sum of consecutive naturals, for example, 17486 + ... + 17631.

It is an arithmetic number, because the mean of its divisors is an integer number (649683).

2^2563541 is an apocalyptic number.

It is an amenable number.

2563541 is a deficient number, since it is larger than the sum of its proper divisors (35191).

2563541 is an equidigital number, since it uses as much as digits as its factorization.

2563541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35190.

The product of its digits is 3600, while the sum is 26.

The square root of 2563541 is about 1601.1061801142. The cubic root of 2563541 is about 136.8611198507.

The spelling of 2563541 in words is "two million, five hundred sixty-three thousand, five hundred forty-one".