261035443 has 4 divisors (see below), whose sum is σ = 261140400. Its totient is φ = 260930488.

The previous prime is 261035431. The next prime is 261035461. The reversal of 261035443 is 344530162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261035443 - 2⁹ = 261034931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261035473) 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 3 ways as a sum of consecutive naturals, for example, 48655 + ... + 53752.

It is an arithmetic number, because the mean of its divisors is an integer number (65285100).

Almost surely, 2^261035443 is an apocalyptic number.

261035443 is a deficient number, since it is larger than the sum of its proper divisors (104957).

261035443 is a wasteful number, since it uses less digits than its factorization.

261035443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104956.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 261035443 is about 16156.5913174778. The cubic root of 261035443 is about 639.0965793401.

The spelling of 261035443 in words is "two hundred sixty-one million, thirty-five thousand, four hundred forty-three".