261495367 has 4 divisors (see below), whose sum is σ = 298851856. Its totient is φ = 224138880.

The previous prime is 261495361. The next prime is 261495373. The reversal of 261495367 is 763594162.

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

It is an interprime number because it is at equal distance from previous prime (261495361) and next prime (261495373).

It is not a de Polignac number, because 261495367 - 2³ = 261495359 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 (261495361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18678234 + ... + 18678247.

It is an arithmetic number, because the mean of its divisors is an integer number (74712964).

Almost surely, 2^261495367 is an apocalyptic number.

261495367 is a deficient number, since it is larger than the sum of its proper divisors (37356489).

261495367 is an equidigital number, since it uses as much as digits as its factorization.

261495367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37356488.

The product of its digits is 272160, while the sum is 43.

The square root of 261495367 is about 16170.8183775590. The cubic root of 261495367 is about 639.4717051466.

The spelling of 261495367 in words is "two hundred sixty-one million, four hundred ninety-five thousand, three hundred sixty-seven".