261530043 has 16 divisors (see below), whose sum is σ = 367620096. Its totient is φ = 165136320.

The previous prime is 261529993. The next prime is 261530047. The reversal of 261530043 is 340035162.

It is a happy number.

It is not a de Polignac number, because 261530043 - 2⁸ = 261529787 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261529995 and 261530022.

It is not an unprimeable number, because it can be changed into a prime (261530047) 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, 25546 + ... + 34287.

It is an arithmetic number, because the mean of its divisors is an integer number (22976256).

Almost surely, 2^261530043 is an apocalyptic number.

261530043 is a deficient number, since it is larger than the sum of its proper divisors (106090053).

261530043 is a wasteful number, since it uses less digits than its factorization.

261530043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59914.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 261530043 is about 16171.8905202824. The cubic root of 261530043 is about 639.4999699441.

The spelling of 261530043 in words is "two hundred sixty-one million, five hundred thirty thousand, forty-three".