2561137 has 2 divisors, whose sum is σ = 2561138. Its totient is φ = 2561136.

The previous prime is 2561129. The next prime is 2561159. The reversal of 2561137 is 7311652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1498176 + 1062961 = 1224^2 + 1031^2 .

It is a cyclic number.

It is not a de Polignac number, because 2561137 - 2³ = 2561129 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2561737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1280568 + 1280569.

It is an arithmetic number, because the mean of its divisors is an integer number (1280569).

2^2561137 is an apocalyptic number.

It is an amenable number.

2561137 is a deficient number, since it is larger than the sum of its proper divisors (1).

2561137 is an equidigital number, since it uses as much as digits as its factorization.

2561137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 25.

The square root of 2561137 is about 1600.3552730566. The cubic root of 2561137 is about 136.8183252642.

Adding to 2561137 its reverse (7311652), we get a palindrome (9872789).

The spelling of 2561137 in words is "two million, five hundred sixty-one thousand, one hundred thirty-seven".