2561925 has 12 divisors (see below), whose sum is σ = 4235840. Its totient is φ = 1366320.

The previous prime is 2561921. The next prime is 2561927. The reversal of 2561925 is 5291652.

It is a happy number.

2561925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2561925 - 2² = 2561921 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2561892 and 2561901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561921) 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 11 ways as a sum of consecutive naturals, for example, 17005 + ... + 17154.

2^2561925 is an apocalyptic number.

2561925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2561925 is a deficient number, since it is larger than the sum of its proper divisors (1673915).

2561925 is a wasteful number, since it uses less digits than its factorization.

2561925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34172 (or 34167 counting only the distinct ones).

The product of its digits is 5400, while the sum is 30.

The square root of 2561925 is about 1600.6014494558. The cubic root of 2561925 is about 136.8323557234.

It can be divided in two parts, 2561 and 925, that added together give a triangular number (3486 = T₈₃).

The spelling of 2561925 in words is "two million, five hundred sixty-one thousand, nine hundred twenty-five".