261296426 has 8 divisors (see below), whose sum is σ = 415000260. Its totient is φ = 122963008.

The previous prime is 261296411. The next prime is 261296429. The reversal of 261296426 is 624692162.

It can be written as a sum of positive squares in 2 ways, for example, as 205779025 + 55517401 = 14345^2 + 7451^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 261296426.

It is not an unprimeable number, because it can be changed into a prime (261296429) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3842561 + ... + 3842628.

Almost surely, 2^261296426 is an apocalyptic number.

261296426 is a deficient number, since it is larger than the sum of its proper divisors (153703834).

261296426 is a wasteful number, since it uses less digits than its factorization.

261296426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7685208.

The product of its digits is 62208, while the sum is 38.

The square root of 261296426 is about 16164.6659724227. The cubic root of 261296426 is about 639.3094977914.

The spelling of 261296426 in words is "two hundred sixty-one million, two hundred ninety-six thousand, four hundred twenty-six".