781245041 has 2 divisors, whose sum is σ = 781245042. Its totient is φ = 781245040.

The previous prime is 781245029. The next prime is 781245089. The reversal of 781245041 is 140542187.

It is a happy number.

781245041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 669308641 + 111936400 = 25871^2 + 10580^2 .

It is an emirp because it is prime and its reverse (140542187) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 781245041 - 2⁶ = 781244977 is a prime.

It is a super-2 number, since 2×781245041² = 1220687628174183362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781244989 and 781245007.

It is not a weakly prime, because it can be changed into another prime (781245341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390622520 + 390622521.

It is an arithmetic number, because the mean of its divisors is an integer number (390622521).

Almost surely, 2^781245041 is an apocalyptic number.

It is an amenable number.

781245041 is a deficient number, since it is larger than the sum of its proper divisors (1).

781245041 is an equidigital number, since it uses as much as digits as its factorization.

781245041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 781245041 is about 27950.7610093178. The cubic root of 781245041 is about 921.0059259507.

The spelling of 781245041 in words is "seven hundred eighty-one million, two hundred forty-five thousand, forty-one".