260541781 has 2 divisors, whose sum is σ = 260541782. Its totient is φ = 260541780.

The previous prime is 260541767. The next prime is 260541803. The reversal of 260541781 is 187145062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145323025 + 115218756 = 12055^2 + 10734^2 .

It is a cyclic number.

It is not a de Polignac number, because 260541781 - 2¹³ = 260533589 is a prime.

It is a super-2 number, since 2×260541781² = 135764039293303922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260541751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130270890 + 130270891.

It is an arithmetic number, because the mean of its divisors is an integer number (130270891).

Almost surely, 2^260541781 is an apocalyptic number.

It is an amenable number.

260541781 is a deficient number, since it is larger than the sum of its proper divisors (1).

260541781 is an equidigital number, since it uses as much as digits as its factorization.

260541781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 260541781 is about 16141.3066695358. The cubic root of 260541781 is about 638.6934453345.

The spelling of 260541781 in words is "two hundred sixty million, five hundred forty-one thousand, seven hundred eighty-one".