726181 has 2 divisors, whose sum is σ = 726182. Its totient is φ = 726180.

The previous prime is 726169. The next prime is 726191. The reversal of 726181 is 181627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 695556 + 30625 = 834^2 + 175^2 .

It is a cyclic number.

It is not a de Polignac number, because 726181 - 2⁵ = 726149 is a prime.

It is a super-2 number, since 2×726181² = 1054677689522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363090 + 363091.

It is an arithmetic number, because the mean of its divisors is an integer number (363091).

2⁷²⁶¹⁸¹ is an apocalyptic number.

726181 is the 456-th centered heptagonal number.

It is an amenable number.

726181 is a deficient number, since it is larger than the sum of its proper divisors (1).

726181 is an equidigital number, since it uses as much as digits as its factorization.

726181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

The square root of 726181 is about 852.1625431806. The cubic root of 726181 is about 89.8838419151.

The spelling of 726181 in words is "seven hundred twenty-six thousand, one hundred eighty-one".