2561135 has 16 divisors (see below), whose sum is σ = 3369600. Its totient is φ = 1860096.

The previous prime is 2561129. The next prime is 2561137. The reversal of 2561135 is 5311652.

It is a cyclic number.

It is not a de Polignac number, because 2561135 - 2⁶ = 2561071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2561135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1946 + ... + 2984.

It is an arithmetic number, because the mean of its divisors is an integer number (210600).

2^2561135 is an apocalyptic number.

2561135 is a deficient number, since it is larger than the sum of its proper divisors (808465).

2561135 is a wasteful number, since it uses less digits than its factorization.

2561135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090.

The product of its digits is 900, while the sum is 23.

The square root of 2561135 is about 1600.3546481952. The cubic root of 2561135 is about 136.8182896502.

Adding to 2561135 its reverse (5311652), we get a palindrome (7872787).

The spelling of 2561135 in words is "two million, five hundred sixty-one thousand, one hundred thirty-five".