120851805 has 64 divisors (see below), whose sum is σ = 209599488. Its totient is φ = 59351040.

The previous prime is 120851791. The next prime is 120851807. The reversal of 120851805 is 508158021.

It is not a de Polignac number, because 120851805 - 2¹⁸ = 120589661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120851807) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1069429 + ... + 1069541.

It is an arithmetic number, because the mean of its divisors is an integer number (3274992).

Almost surely, 2^120851805 is an apocalyptic number.

120851805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120851805 is a deficient number, since it is larger than the sum of its proper divisors (88747683).

120851805 is a wasteful number, since it uses less digits than its factorization.

120851805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246.

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 120851805 is about 10993.2617998481. The cubic root of 120851805 is about 494.4067374725.

The spelling of 120851805 in words is "one hundred twenty million, eight hundred fifty-one thousand, eight hundred five".