2661025 has 6 divisors (see below), whose sum is σ = 3299702. Its totient is φ = 2128800.

The previous prime is 2661013. The next prime is 2661067. The reversal of 2661025 is 5201662.

It can be written as a sum of positive squares in 3 ways, for example, as 26896 + 2634129 = 164^2 + 1623^2 .

It is not a de Polignac number, because 2661025 - 2¹¹ = 2658977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2660987 and 2661005.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53196 + ... + 53245.

2^2661025 is an apocalyptic number.

2661025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2661025 is a deficient number, since it is larger than the sum of its proper divisors (638677).

2661025 is a wasteful number, since it uses less digits than its factorization.

2661025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106451 (or 106446 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2661025 is about 1631.2648466757. The cubic root of 2661025 is about 138.5743929949.

Adding to 2661025 its reverse (5201662), we get a palindrome (7862687).

The spelling of 2661025 in words is "two million, six hundred sixty-one thousand, twenty-five".