261252583 has 4 divisors (see below), whose sum is σ = 276620400. Its totient is φ = 245884768.

The previous prime is 261252581. The next prime is 261252601. The reversal of 261252583 is 385252162.

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

It is a cyclic number.

It is not a de Polignac number, because 261252583 - 2¹ = 261252581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261252581) 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, 7683883 + ... + 7683916.

It is an arithmetic number, because the mean of its divisors is an integer number (69155100).

Almost surely, 2^261252583 is an apocalyptic number.

261252583 is a deficient number, since it is larger than the sum of its proper divisors (15367817).

261252583 is a wasteful number, since it uses less digits than its factorization.

261252583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15367816.

The product of its digits is 28800, while the sum is 34.

The square root of 261252583 is about 16163.3097786314. The cubic root of 261252583 is about 639.2737391519.

The spelling of 261252583 in words is "two hundred sixty-one million, two hundred fifty-two thousand, five hundred eighty-three".