261296867 has 8 divisors (see below), whose sum is σ = 281579424. Its totient is φ = 241040448.

The previous prime is 261296863. The next prime is 261296869. The reversal of 261296867 is 768692162.

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 261296867 - 2² = 261296863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261296863) 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, 17543 + ... + 28815.

It is an arithmetic number, because the mean of its divisors is an integer number (35197428).

Almost surely, 2^261296867 is an apocalyptic number.

261296867 is a deficient number, since it is larger than the sum of its proper divisors (20282557).

261296867 is a wasteful number, since it uses less digits than its factorization.

261296867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13069.

The product of its digits is 435456, while the sum is 47.

The square root of 261296867 is about 16164.6796132803. The cubic root of 261296867 is about 639.3098574536.

The spelling of 261296867 in words is "two hundred sixty-one million, two hundred ninety-six thousand, eight hundred sixty-seven".