785321 has 2 divisors, whose sum is σ = 785322. Its totient is φ = 785320.

The previous prime is 785311. The next prime is 785329. The reversal of 785321 is 123587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 570025 + 215296 = 755^2 + 464^2 .

It is a cyclic number.

It is not a de Polignac number, because 785321 - 2¹⁸ = 523177 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (785329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392660 + 392661.

It is an arithmetic number, because the mean of its divisors is an integer number (392661).

2⁷⁸⁵³²¹ is an apocalyptic number.

It is an amenable number.

785321 is a deficient number, since it is larger than the sum of its proper divisors (1).

785321 is an equidigital number, since it uses as much as digits as its factorization.

785321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 26.

The square root of 785321 is about 886.1833895983. The cubic root of 785321 is about 92.2604857806.

The spelling of 785321 in words is "seven hundred eighty-five thousand, three hundred twenty-one".