261250053 has 16 divisors (see below), whose sum is σ = 358525440. Its totient is φ = 169142384.

The previous prime is 261250039. The next prime is 261250061. The reversal of 261250053 is 350052162.

It is a cyclic number.

It is not a de Polignac number, because 261250053 - 2⁸ = 261249797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261250453) 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 15 ways as a sum of consecutive naturals, for example, 5800 + ... + 23582.

It is an arithmetic number, because the mean of its divisors is an integer number (22407840).

Almost surely, 2^261250053 is an apocalyptic number.

It is an amenable number.

261250053 is a deficient number, since it is larger than the sum of its proper divisors (97275387).

261250053 is a wasteful number, since it uses less digits than its factorization.

261250053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17928.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 261250053 is about 16163.2315147683. The cubic root of 261250053 is about 639.2716755451.

The spelling of 261250053 in words is "two hundred sixty-one million, two hundred fifty thousand, fifty-three".