860454821 has 2 divisors, whose sum is σ = 860454822. Its totient is φ = 860454820.

The previous prime is 860454799. The next prime is 860454839. The reversal of 860454821 is 128454068.

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., 853224100 + 7230721 = 29210^2 + 2689^2 .

It is a cyclic number.

It is not a de Polignac number, because 860454821 - 2⁶ = 860454757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (860454871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430227410 + 430227411.

It is an arithmetic number, because the mean of its divisors is an integer number (430227411).

Almost surely, 2^860454821 is an apocalyptic number.

It is an amenable number.

860454821 is a deficient number, since it is larger than the sum of its proper divisors (1).

860454821 is an equidigital number, since it uses as much as digits as its factorization.

860454821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 860454821 is about 29333.5102059061. The cubic root of 860454821 is about 951.1361553514.

The spelling of 860454821 in words is "eight hundred sixty million, four hundred fifty-four thousand, eight hundred twenty-one".