261458873 has 4 divisors (see below), whose sum is σ = 281571108. Its totient is φ = 241346640.

The previous prime is 261458833. The next prime is 261458893. The reversal of 261458873 is 378854162.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 112423609 + 149035264 = 10603^2 + 12208^2 .

It is a cyclic number.

It is not a de Polignac number, because 261458873 - 2¹⁰ = 261457849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261458833) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10056098 + ... + 10056123.

It is an arithmetic number, because the mean of its divisors is an integer number (70392777).

Almost surely, 2^261458873 is an apocalyptic number.

It is an amenable number.

261458873 is a deficient number, since it is larger than the sum of its proper divisors (20112235).

261458873 is a wasteful number, since it uses less digits than its factorization.

261458873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20112234.

The product of its digits is 322560, while the sum is 44.

The square root of 261458873 is about 16169.6899475531. The cubic root of 261458873 is about 639.4419557781.

The spelling of 261458873 in words is "two hundred sixty-one million, four hundred fifty-eight thousand, eight hundred seventy-three".