261768041 has 4 divisors (see below), whose sum is σ = 261816192. Its totient is φ = 261719892.

The previous prime is 261767971. The next prime is 261768049. The reversal of 261768041 is 140867162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261768041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261767992 and 261768010.

It is not an unprimeable number, because it can be changed into a prime (261768049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14705 + ... + 27198.

It is an arithmetic number, because the mean of its divisors is an integer number (65454048).

Almost surely, 2^261768041 is an apocalyptic number.

It is an amenable number.

261768041 is a deficient number, since it is larger than the sum of its proper divisors (48151).

261768041 is an equidigital number, since it uses as much as digits as its factorization.

261768041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48150.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 261768041 is about 16179.2472321799. The cubic root of 261768041 is about 639.6938974015.

The spelling of 261768041 in words is "two hundred sixty-one million, seven hundred sixty-eight thousand, forty-one".