4172901605 has 16 divisors (see below), whose sum is σ = 5052653424. Its totient is φ = 3308336640.

The previous prime is 4172901563. The next prime is 4172901671. The reversal of 4172901605 is 5061092714.

4172901605 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 64598²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 45995524 + 4126906081 = 6782^2 + 64241^2 .

It is not a de Polignac number, because 4172901605 - 2⁶ = 4172901541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 257297 + ... + 273033.

It is an arithmetic number, because the mean of its divisors is an integer number (315790839).

Almost surely, 2^4172901605 is an apocalyptic number.

It is an amenable number.

4172901605 is a deficient number, since it is larger than the sum of its proper divisors (879751819).

4172901605 is a wasteful number, since it uses less digits than its factorization.

4172901605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16216.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 4172901605 is about 64598.0000077402. Note that the first 5 decimals coincide. The cubic root of 4172901605 is about 1609.9512098945.

The spelling of 4172901605 in words is "four billion, one hundred seventy-two million, nine hundred one thousand, six hundred five".