261012935 has 16 divisors (see below), whose sum is σ = 317656416. Its totient is φ = 205867008.

The previous prime is 261012931. The next prime is 261012943. The reversal of 261012935 is 539210162.

It is a cyclic number.

It is not a de Polignac number, because 261012935 - 2² = 261012931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261012898 and 261012907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261012931) 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 15 ways as a sum of consecutive naturals, for example, 148019 + ... + 149771.

It is an arithmetic number, because the mean of its divisors is an integer number (19853526).

Almost surely, 2^261012935 is an apocalyptic number.

261012935 is a deficient number, since it is larger than the sum of its proper divisors (56643481).

261012935 is a wasteful number, since it uses less digits than its factorization.

261012935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 261012935 is about 16155.8947446435. The cubic root of 261012935 is about 639.0782099326.

The spelling of 261012935 in words is "two hundred sixty-one million, twelve thousand, nine hundred thirty-five".