720106105 has 16 divisors (see below), whose sum is σ = 894750480. Its totient is φ = 555706368.

The previous prime is 720106067. The next prime is 720106139. The reversal of 720106105 is 501601027.

It can be written as a sum of positive squares in 8 ways, for example, as 120297024 + 599809081 = 10968^2 + 24491^2 .

It is a cyclic number.

It is not a de Polignac number, because 720106105 - 2¹⁷ = 719975033 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252769 + ... + 255601.

It is an arithmetic number, because the mean of its divisors is an integer number (55921905).

Almost surely, 2^720106105 is an apocalyptic number.

It is an amenable number.

720106105 is a deficient number, since it is larger than the sum of its proper divisors (174644375).

720106105 is a wasteful number, since it uses less digits than its factorization.

720106105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4620.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 720106105 is about 26834.7928071003. The cubic root of 720106105 is about 896.3249748758.

The spelling of 720106105 in words is "seven hundred twenty million, one hundred six thousand, one hundred five".