860537021 has 2 divisors, whose sum is σ = 860537022. Its totient is φ = 860537020.

The previous prime is 860537017. The next prime is 860537023. The reversal of 860537021 is 120735068.

It is a happy number.

860537021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 843612025 + 16924996 = 29045^2 + 4114^2 .

It is a cyclic number.

It is not a de Polignac number, because 860537021 - 2² = 860537017 is a prime.

Together with 860537023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (860537023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430268510 + 430268511.

It is an arithmetic number, because the mean of its divisors is an integer number (430268511).

Almost surely, 2^860537021 is an apocalyptic number.

It is an amenable number.

860537021 is a deficient number, since it is larger than the sum of its proper divisors (1).

860537021 is an equidigital number, since it uses as much as digits as its factorization.

860537021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 860537021 is about 29334.9113003602. The cubic root of 860537021 is about 951.1664420093.

The spelling of 860537021 in words is "eight hundred sixty million, five hundred thirty-seven thousand, twenty-one".