261062743 has 4 divisors (see below), whose sum is σ = 261129088. Its totient is φ = 260996400.

The previous prime is 261062741. The next prime is 261062759. The reversal of 261062743 is 347260162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 347260162 = 2 ⋅173630081.

It is a cyclic number.

It is not a de Polignac number, because 261062743 - 2¹ = 261062741 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 (261062741) 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, 26871 + ... + 35272.

It is an arithmetic number, because the mean of its divisors is an integer number (65282272).

Almost surely, 2^261062743 is an apocalyptic number.

261062743 is a deficient number, since it is larger than the sum of its proper divisors (66345).

261062743 is an equidigital number, since it uses as much as digits as its factorization.

261062743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66344.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 261062743 is about 16157.4361518157. The cubic root of 261062743 is about 639.1188582156.

The spelling of 261062743 in words is "two hundred sixty-one million, sixty-two thousand, seven hundred forty-three".