2025561 has 4 divisors (see below), whose sum is σ = 2700752. Its totient is φ = 1350372.

The previous prime is 2025557. The next prime is 2025577. The reversal of 2025561 is 1655202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2025561 - 2² = 2025557 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2025511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337591 + ... + 337596.

It is an arithmetic number, because the mean of its divisors is an integer number (675188).

2^2025561 is an apocalyptic number.

It is an amenable number.

2025561 is a deficient number, since it is larger than the sum of its proper divisors (675191).

2025561 is an equidigital number, since it uses as much as digits as its factorization.

2025561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675190.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2025561 is about 1423.2220487331. Note that the first 3 decimals coincide. The cubic root of 2025561 is about 126.5265818209.

The spelling of 2025561 in words is "two million, twenty-five thousand, five hundred sixty-one".