861365041 has 2 divisors, whose sum is σ = 861365042. Its totient is φ = 861365040.

The previous prime is 861365003. The next prime is 861365077. The reversal of 861365041 is 140563168.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 858724416 + 2640625 = 29304^2 + 1625^2 .

It is a cyclic number.

It is not a de Polignac number, because 861365041 - 2⁷ = 861364913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 861364988 and 861365006.

It is not a weakly prime, because it can be changed into another prime (861365441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430682520 + 430682521.

It is an arithmetic number, because the mean of its divisors is an integer number (430682521).

Almost surely, 2^861365041 is an apocalyptic number.

It is an amenable number.

861365041 is a deficient number, since it is larger than the sum of its proper divisors (1).

861365041 is an equidigital number, since it uses as much as digits as its factorization.

861365041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 861365041 is about 29349.0211250733. The cubic root of 861365041 is about 951.4714191514.

The spelling of 861365041 in words is "eight hundred sixty-one million, three hundred sixty-five thousand, forty-one".