261050043 has 8 divisors (see below), whose sum is σ = 353966400. Its totient is φ = 171083528.

The previous prime is 261050029. The next prime is 261050047. The reversal of 261050043 is 340050162.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261050043 - 2¹⁴ = 261033659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261050047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 737253 + ... + 737606.

It is an arithmetic number, because the mean of its divisors is an integer number (44245800).

Almost surely, 2^261050043 is an apocalyptic number.

261050043 is a deficient number, since it is larger than the sum of its proper divisors (92916357).

261050043 is a wasteful number, since it uses less digits than its factorization.

261050043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474921.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 261050043 is about 16157.0431391390. The cubic root of 261050043 is about 639.1084942433.

The spelling of 261050043 in words is "two hundred sixty-one million, fifty thousand, forty-three".