260145749 has 2 divisors, whose sum is σ = 260145750. Its totient is φ = 260145748.

The previous prime is 260145737. The next prime is 260145751. The reversal of 260145749 is 947541062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138815524 + 121330225 = 11782^2 + 11015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260145749 is a prime.

Together with 260145751, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260145719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130072874 + 130072875.

It is an arithmetic number, because the mean of its divisors is an integer number (130072875).

Almost surely, 2^260145749 is an apocalyptic number.

It is an amenable number.

260145749 is a deficient number, since it is larger than the sum of its proper divisors (1).

260145749 is an equidigital number, since it uses as much as digits as its factorization.

260145749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 260145749 is about 16129.0343480321. The cubic root of 260145749 is about 638.3696696103.

The spelling of 260145749 in words is "two hundred sixty million, one hundred forty-five thousand, seven hundred forty-nine".