261242326 has 16 divisors (see below), whose sum is σ = 414507744. Its totient is φ = 123228864.

The previous prime is 261242297. The next prime is 261242347. The reversal of 261242326 is 623242162.

It is a junction number, because it is equal to n+sod(n) for n = 261242294 and 261242303.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 35541 + ... + 42256.

It is an arithmetic number, because the mean of its divisors is an integer number (25906734).

Almost surely, 2^261242326 is an apocalyptic number.

261242326 is a deficient number, since it is larger than the sum of its proper divisors (153265418).

261242326 is a wasteful number, since it uses less digits than its factorization.

261242326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77895.

The product of its digits is 6912, while the sum is 28.

The square root of 261242326 is about 16162.9924828294. The cubic root of 261242326 is about 639.2653728977.

Adding to 261242326 its reverse (623242162), we get a palindrome (884484488).

The spelling of 261242326 in words is "two hundred sixty-one million, two hundred forty-two thousand, three hundred twenty-six".