118025821 has 2 divisors, whose sum is σ = 118025822. Its totient is φ = 118025820.

The previous prime is 118025807. The next prime is 118025827. The reversal of 118025821 is 128520811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84548025 + 33477796 = 9195^2 + 5786^2 .

It is an emirp because it is prime and its reverse (128520811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118025821 - 2⁷ = 118025693 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118025821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118025827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59012910 + 59012911.

It is an arithmetic number, because the mean of its divisors is an integer number (59012911).

Almost surely, 2^118025821 is an apocalyptic number.

It is an amenable number.

118025821 is a deficient number, since it is larger than the sum of its proper divisors (1).

118025821 is an equidigital number, since it uses as much as digits as its factorization.

118025821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 118025821 is about 10863.9689340498. The cubic root of 118025821 is about 490.5225869838.

The spelling of 118025821 in words is "one hundred eighteen million, twenty-five thousand, eight hundred twenty-one".