2605574261 has 2 divisors, whose sum is σ = 2605574262. Its totient is φ = 2605574260.

The previous prime is 2605574249. The next prime is 2605574303. The reversal of 2605574261 is 1624755062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1956292900 + 649281361 = 44230^2 + 25481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2605574261 is a prime.

It is a super-2 number, since 2×2605574261² = 13578034459171392242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2605574201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302787130 + 1302787131.

It is an arithmetic number, because the mean of its divisors is an integer number (1302787131).

Almost surely, 2^2605574261 is an apocalyptic number.

It is an amenable number.

2605574261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605574261 is an equidigital number, since it uses as much as digits as its factorization.

2605574261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 2605574261 is about 51044.8259963730. The cubic root of 2605574261 is about 1376.0508570094.

The spelling of 2605574261 in words is "two billion, six hundred five million, five hundred seventy-four thousand, two hundred sixty-one".