2540261 has 2 divisors, whose sum is σ = 2540262. Its totient is φ = 2540260.

The previous prime is 2540249. The next prime is 2540269. The reversal of 2540261 is 1620452.

It is a happy number.

2540261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1890625 + 649636 = 1375^2 + 806^2 .

It is a cyclic number.

It is not a de Polignac number, because 2540261 - 2¹⁴ = 2523877 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2540269) 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 as a sum of consecutive naturals, namely, 1270130 + 1270131.

It is an arithmetic number, because the mean of its divisors is an integer number (1270131).

2^2540261 is an apocalyptic number.

It is an amenable number.

2540261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540261 is an equidigital number, since it uses as much as digits as its factorization.

2540261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2540261 is about 1593.8196259301. The cubic root of 2540261 is about 136.4455721856.

The spelling of 2540261 in words is "two million, five hundred forty thousand, two hundred sixty-one".