261530130 has 32 divisors (see below), whose sum is σ = 629496000. Its totient is φ = 69538752.

The previous prime is 261530089. The next prime is 261530141. The reversal of 261530130 is 31035162.

It is a junction number, because it is equal to n+sod(n) for n = 261530097 and 261530106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2020 + ... + 22959.

It is an arithmetic number, because the mean of its divisors is an integer number (19671750).

Almost surely, 2^261530130 is an apocalyptic number.

261530130 is an abundant number, since it is smaller than the sum of its proper divisors (367965870).

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

261530130 is a wasteful number, since it uses less digits than its factorization.

261530130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25338.

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

The square root of 261530130 is about 16171.8932101347. The cubic root of 261530130 is about 639.5000408556.

Adding to 261530130 its reverse (31035162), we get a palindrome (292565292).

The spelling of 261530130 in words is "two hundred sixty-one million, five hundred thirty thousand, one hundred thirty".