261875159 has 48 divisors (see below), whose sum is σ = 346421376. Its totient is φ = 195955200.

The previous prime is 261875153. The next prime is 261875183. The reversal of 261875159 is 951578162.

It is not a de Polignac number, because 261875159 - 2¹² = 261871063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261875153) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 966194 + ... + 966464.

It is an arithmetic number, because the mean of its divisors is an integer number (7217112).

Almost surely, 2^261875159 is an apocalyptic number.

261875159 is a deficient number, since it is larger than the sum of its proper divisors (84546217).

261875159 is a wasteful number, since it uses less digits than its factorization.

261875159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 369 counting only the distinct ones).

The product of its digits is 151200, while the sum is 44.

The square root of 261875159 is about 16182.5572453800. The cubic root of 261875159 is about 639.7811418006.

It can be divided in two parts, 2618 and 75159, that added together give a palindrome (77777).

The spelling of 261875159 in words is "two hundred sixty-one million, eight hundred seventy-five thousand, one hundred fifty-nine".