726981 has 8 divisors (see below), whose sum is σ = 1000704. Its totient is φ = 468960.

The previous prime is 726953. The next prime is 726983. The reversal of 726981 is 189627.

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

It is not a de Polignac number, because 726981 - 2⁶ = 726917 is a prime.

It is a super-2 number, since 2×726981² = 1057002748722, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 726981.

It is not an unprimeable number, because it can be changed into a prime (726983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3816 + ... + 4001.

It is an arithmetic number, because the mean of its divisors is an integer number (125088).

2⁷²⁶⁹⁸¹ is an apocalyptic number.

It is an amenable number.

726981 is a deficient number, since it is larger than the sum of its proper divisors (273723).

726981 is a wasteful number, since it uses less digits than its factorization.

726981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7851.

The product of its digits is 6048, while the sum is 33.

The square root of 726981 is about 852.6318079922. The cubic root of 726981 is about 89.9168367581.

The spelling of 726981 in words is "seven hundred twenty-six thousand, nine hundred eighty-one".