2561025 has 12 divisors (see below), whose sum is σ = 4234352. Its totient is φ = 1365840.

The previous prime is 2561023. The next prime is 2561051. The reversal of 2561025 is 5201652.

It is not a de Polignac number, because 2561025 - 2¹ = 2561023 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2560992 and 2561010.

It is not an unprimeable number, because it can be changed into a prime (2561021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16999 + ... + 17148.

2^2561025 is an apocalyptic number.

2561025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2561025 is a deficient number, since it is larger than the sum of its proper divisors (1673327).

2561025 is a wasteful number, since it uses less digits than its factorization.

2561025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34160 (or 34155 counting only the distinct ones).

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

The square root of 2561025 is about 1600.3202804439. The cubic root of 2561025 is about 136.8163308536.

Adding to 2561025 its reverse (5201652), we get a palindrome (7762677).

The spelling of 2561025 in words is "two million, five hundred sixty-one thousand, twenty-five".