261121359 has 8 divisors (see below), whose sum is σ = 348301872. Its totient is φ = 174010880.

The previous prime is 261121349. The next prime is 261121361. The reversal of 261121359 is 953121162.

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

It is a cyclic number.

It is not a de Polignac number, because 261121359 - 2⁸ = 261121103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261121349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8082 + ... + 24239.

It is an arithmetic number, because the mean of its divisors is an integer number (43537734).

Almost surely, 2^261121359 is an apocalyptic number.

261121359 is a deficient number, since it is larger than the sum of its proper divisors (87180513).

261121359 is a wasteful number, since it uses less digits than its factorization.

261121359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35017.

The product of its digits is 3240, while the sum is 30.

The square root of 261121359 is about 16159.2499516531. The cubic root of 261121359 is about 639.1666880809.

The spelling of 261121359 in words is "two hundred sixty-one million, one hundred twenty-one thousand, three hundred fifty-nine".