785981 has 8 divisors (see below), whose sum is σ = 917760. Its totient is φ = 659088.

The previous prime is 785963. The next prime is 786001. The reversal of 785981 is 189587.

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

It is a cyclic number.

It is not a de Polignac number, because 785981 - 2¹⁰ = 784957 is a prime.

It is a super-2 number, since 2×785981² = 1235532264722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (785921) 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, 866 + ... + 1523.

It is an arithmetic number, because the mean of its divisors is an integer number (114720).

2⁷⁸⁵⁹⁸¹ is an apocalyptic number.

It is an amenable number.

785981 is a deficient number, since it is larger than the sum of its proper divisors (131779).

785981 is a wasteful number, since it uses less digits than its factorization.

785981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443.

The product of its digits is 20160, while the sum is 38.

The square root of 785981 is about 886.5556948100. Note that the first 3 decimals coincide. The cubic root of 785981 is about 92.2863244166.

The spelling of 785981 in words is "seven hundred eighty-five thousand, nine hundred eighty-one".