2510561 has 4 divisors (see below), whose sum is σ = 2578452. Its totient is φ = 2442672.

The previous prime is 2510551. The next prime is 2510567. The reversal of 2510561 is 1650152.

2510561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2119936 + 390625 = 1456^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 2510561 - 2¹⁰ = 2509537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2510567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33890 + ... + 33963.

It is an arithmetic number, because the mean of its divisors is an integer number (644613).

2^2510561 is an apocalyptic number.

It is an amenable number.

2510561 is a deficient number, since it is larger than the sum of its proper divisors (67891).

2510561 is an equidigital number, since it uses as much as digits as its factorization.

2510561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67890.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 2510561 is about 1584.4749919137. The cubic root of 2510561 is about 135.9117254432.

The spelling of 2510561 in words is "two million, five hundred ten thousand, five hundred sixty-one".