120840705 has 24 divisors (see below), whose sum is σ = 215121192. Its totient is φ = 62705664.

The previous prime is 120840701. The next prime is 120840737. The reversal of 120840705 is 507048021.

It can be written as a sum of positive squares in 4 ways, for example, as 10653696 + 110187009 = 3264^2 + 10497^2 .

It is not a de Polignac number, because 120840705 - 2² = 120840701 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (120840701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34624 + ... + 37953.

It is an arithmetic number, because the mean of its divisors is an integer number (8963383).

Almost surely, 2^120840705 is an apocalyptic number.

120840705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120840705 is a deficient number, since it is larger than the sum of its proper divisors (94280487).

120840705 is a wasteful number, since it uses less digits than its factorization.

120840705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72625 (or 72622 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 120840705 is about 10992.7569335449. The cubic root of 120840705 is about 494.3916002477.

Adding to 120840705 its reverse (507048021), we get a palindrome (627888726).

The spelling of 120840705 in words is "one hundred twenty million, eight hundred forty thousand, seven hundred five".