261041035 has 16 divisors (see below), whose sum is σ = 343116000. Its totient is φ = 189769216.

The previous prime is 261041017. The next prime is 261041041. The reversal of 261041035 is 530140162.

It is a cyclic number.

It is not a de Polignac number, because 261041035 - 2⁹ = 261040523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261040997 and 261041015.

It is an unprimeable number.

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, 50485 + ... + 55414.

It is an arithmetic number, because the mean of its divisors is an integer number (21444750).

Almost surely, 2^261041035 is an apocalyptic number.

261041035 is a deficient number, since it is larger than the sum of its proper divisors (82074965).

261041035 is a wasteful number, since it uses less digits than its factorization.

261041035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105950.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 261041035 is about 16156.7643728563. The cubic root of 261041035 is about 639.1011429637.

Adding to 261041035 its reverse (530140162), we get a palindrome (791181197).

The spelling of 261041035 in words is "two hundred sixty-one million, forty-one thousand, thirty-five".