261058530 has 16 divisors (see below), whose sum is σ = 626540544. Its totient is φ = 69615600.

The previous prime is 261058529. The next prime is 261058531. The reversal of 261058530 is 35850162.

It is an interprime number because it is at equal distance from previous prime (261058529) and next prime (261058531).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 8701951 = 261058530 / (2 + 6 + 1 + 0 + 5 + 8 + 5 + 3 + 0).

It is not an unprimeable number, because it can be changed into a prime (261058531) 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, 4350946 + ... + 4351005.

It is an arithmetic number, because the mean of its divisors is an integer number (39158784).

Almost surely, 2^261058530 is an apocalyptic number.

261058530 is an abundant number, since it is smaller than the sum of its proper divisors (365482014).

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

261058530 is a wasteful number, since it uses less digits than its factorization.

261058530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8701961.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 261058530 is about 16157.3057778826. The cubic root of 261058530 is about 639.1154201886.

The spelling of 261058530 in words is "two hundred sixty-one million, fifty-eight thousand, five hundred thirty".