261067745 has 16 divisors (see below), whose sum is σ = 325839360. Its totient is φ = 200625984.

The previous prime is 261067727. The next prime is 261067747. The reversal of 261067745 is 547760162.

It is a cyclic number.

It is not a de Polignac number, because 261067745 - 2²⁰ = 260019169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261067699 and 261067708.

It is not an unprimeable number, because it can be changed into a prime (261067747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5684 + ... + 23546.

It is an arithmetic number, because the mean of its divisors is an integer number (20364960).

Almost surely, 2^261067745 is an apocalyptic number.

It is an amenable number.

261067745 is a deficient number, since it is larger than the sum of its proper divisors (64771615).

261067745 is a wasteful number, since it uses less digits than its factorization.

261067745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17984.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 261067745 is about 16157.5909404837. The cubic root of 261067745 is about 639.1229400595.

The spelling of 261067745 in words is "two hundred sixty-one million, sixty-seven thousand, seven hundred forty-five".