120815867 has 4 divisors (see below), whose sum is σ = 120892656. Its totient is φ = 120739080.

The previous prime is 120815861. The next prime is 120815869. The reversal of 120815867 is 768518021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120815867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120815867.

It is not an unprimeable number, because it can be changed into a prime (120815861) 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, 35984 + ... + 39197.

It is an arithmetic number, because the mean of its divisors is an integer number (30223164).

Almost surely, 2^120815867 is an apocalyptic number.

120815867 is a deficient number, since it is larger than the sum of its proper divisors (76789).

120815867 is an equidigital number, since it uses as much as digits as its factorization.

120815867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76788.

The product of its (nonzero) digits is 26880, while the sum is 38.

The square root of 120815867 is about 10991.6271315943. The cubic root of 120815867 is about 494.3577249626.

It can be divided in two parts, 1208 and 15867, that multiplied together give a triangular number (19167336 = T₆₁₉₁).

The spelling of 120815867 in words is "one hundred twenty million, eight hundred fifteen thousand, eight hundred sixty-seven".