120818857 has 4 divisors (see below), whose sum is σ = 122799556. Its totient is φ = 118838160.

The previous prime is 120818837. The next prime is 120818861. The reversal of 120818857 is 758818021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36252441 + 84566416 = 6021^2 + 9196^2 .

It is a cyclic number.

It is not a de Polignac number, because 120818857 - 2¹¹ = 120816809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120818837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 990258 + ... + 990379.

It is an arithmetic number, because the mean of its divisors is an integer number (30699889).

Almost surely, 2^120818857 is an apocalyptic number.

It is an amenable number.

120818857 is a deficient number, since it is larger than the sum of its proper divisors (1980699).

120818857 is an equidigital number, since it uses as much as digits as its factorization.

120818857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980698.

The product of its (nonzero) digits is 35840, while the sum is 40.

The square root of 120818857 is about 10991.7631433724. The cubic root of 120818857 is about 494.3618031173.

The spelling of 120818857 in words is "one hundred twenty million, eight hundred eighteen thousand, eight hundred fifty-seven".