801318261 has 16 divisors (see below), whose sum is σ = 1081430784. Its totient is φ = 527729664.

The previous prime is 801318257. The next prime is 801318277. The reversal of 801318261 is 162813108.

It is not a de Polignac number, because 801318261 - 2² = 801318257 is a prime.

It is a super-2 number, since 2×801318261² = 1284221910824128242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801318211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177316 + ... + 181778.

It is an arithmetic number, because the mean of its divisors is an integer number (67589424).

Almost surely, 2^801318261 is an apocalyptic number.

It is an amenable number.

801318261 is a deficient number, since it is larger than the sum of its proper divisors (280112523).

801318261 is a wasteful number, since it uses less digits than its factorization.

801318261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5180.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 801318261 is about 28307.5654375292. The cubic root of 801318261 is about 928.8273890301.

The spelling of 801318261 in words is "eight hundred one million, three hundred eighteen thousand, two hundred sixty-one".