261384743 has 8 divisors (see below), whose sum is σ = 271362000. Its totient is φ = 251471808.

The previous prime is 261384733. The next prime is 261384763. The reversal of 261384743 is 347483162.

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 261384743 - 2⁴ = 261384727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261384697 and 261384706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261384703) 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, 7718 + ... + 24131.

It is an arithmetic number, because the mean of its divisors is an integer number (33920250).

Almost surely, 2^261384743 is an apocalyptic number.

261384743 is a deficient number, since it is larger than the sum of its proper divisors (9977257).

261384743 is a wasteful number, since it uses less digits than its factorization.

261384743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32161.

The product of its digits is 96768, while the sum is 38.

The square root of 261384743 is about 16167.3975333076. The cubic root of 261384743 is about 639.3815175759.

The spelling of 261384743 in words is "two hundred sixty-one million, three hundred eighty-four thousand, seven hundred forty-three".