261464843 has 4 divisors (see below), whose sum is σ = 261499728. Its totient is φ = 261429960.

The previous prime is 261464837. The next prime is 261464893. The reversal of 261464843 is 348464162.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 261464843 - 2⁸ = 261464587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261464797 and 261464806.

It is not an unprimeable number, because it can be changed into a prime (261464893) 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, 1088 + ... + 22893.

It is an arithmetic number, because the mean of its divisors is an integer number (65374932).

Almost surely, 2^261464843 is an apocalyptic number.

261464843 is a deficient number, since it is larger than the sum of its proper divisors (34885).

261464843 is a wasteful number, since it uses less digits than its factorization.

261464843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34884.

The product of its digits is 110592, while the sum is 38.

The square root of 261464843 is about 16169.8745511522. The cubic root of 261464843 is about 639.4468226231.

The spelling of 261464843 in words is "two hundred sixty-one million, four hundred sixty-four thousand, eight hundred forty-three".