261130530 has 16 divisors (see below), whose sum is σ = 626713344. Its totient is φ = 69634800.

The previous prime is 261130511. The next prime is 261130531. The reversal of 261130530 is 35031162.

It is a junction number, because it is equal to n+sod(n) for n = 261130497 and 261130506.

It is not an unprimeable number, because it can be changed into a prime (261130531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4352146 + ... + 4352205.

It is an arithmetic number, because the mean of its divisors is an integer number (39169584).

Almost surely, 2^261130530 is an apocalyptic number.

261130530 is an abundant number, since it is smaller than the sum of its proper divisors (365582814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261130530 is a wasteful number, since it uses less digits than its factorization.

261130530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8704361.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 261130530 is about 16159.5337185205. The cubic root of 261130530 is about 639.1741708456.

Adding to 261130530 its reverse (35031162), we get a palindrome (296161692).

The spelling of 261130530 in words is "two hundred sixty-one million, one hundred thirty thousand, five hundred thirty".