785643241 has 2 divisors, whose sum is σ = 785643242. Its totient is φ = 785643240.

The previous prime is 785643197. The next prime is 785643259. The reversal of 785643241 is 142346587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 512071641 + 273571600 = 22629^2 + 16540^2 .

It is a cyclic number.

It is not a de Polignac number, because 785643241 - 2²¹ = 783546089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 785643194 and 785643203.

It is not a weakly prime, because it can be changed into another prime (785643041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392821620 + 392821621.

It is an arithmetic number, because the mean of its divisors is an integer number (392821621).

Almost surely, 2^785643241 is an apocalyptic number.

It is an amenable number.

785643241 is a deficient number, since it is larger than the sum of its proper divisors (1).

785643241 is an equidigital number, since it uses as much as digits as its factorization.

785643241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 40.

The square root of 785643241 is about 28029.3282295527. The cubic root of 785643241 is about 922.7310314587.

The spelling of 785643241 in words is "seven hundred eighty-five million, six hundred forty-three thousand, two hundred forty-one".