261011073 has 8 divisors (see below), whose sum is σ = 351208000. Its totient is φ = 172410768.

The previous prime is 261011071. The next prime is 261011083. The reversal of 261011073 is 370110162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261011073 - 2¹ = 261011071 is a prime.

It is a super-2 number, since 2×261011073² = 136253560457222658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261011071) 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, 398773 + ... + 399426.

It is an arithmetic number, because the mean of its divisors is an integer number (43901000).

Almost surely, 2^261011073 is an apocalyptic number.

It is an amenable number.

261011073 is a deficient number, since it is larger than the sum of its proper divisors (90196927).

261011073 is a wasteful number, since it uses less digits than its factorization.

261011073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798311.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 261011073 is about 16155.8371185154. The cubic root of 261011073 is about 639.0766902551.

The spelling of 261011073 in words is "two hundred sixty-one million, eleven thousand, seventy-three".