3872545 has 8 divisors (see below), whose sum is σ = 4672296. Its totient is φ = 3081216.

The previous prime is 3872543. The next prime is 3872567. The reversal of 3872545 is 5452783.

3872545 = 1391² + 1392².

It is a happy number.

3872545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 512656 + 3359889 = 716^2 + 1833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3872545 - 2¹ = 3872543 is a prime.

It is an alternating number because its digits alternate between odd and even.

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 3872545.

It is not an unprimeable number, because it can be changed into a prime (3872543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1042 + ... + 2971.

It is an arithmetic number, because the mean of its divisors is an integer number (584037).

Almost surely, 2^3872545 is an apocalyptic number.

3872545 is the 1392-nd centered square number.

It is an amenable number.

3872545 is a deficient number, since it is larger than the sum of its proper divisors (799751).

3872545 is a wasteful number, since it uses less digits than its factorization.

3872545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4211.

The product of its digits is 33600, while the sum is 34.

The square root of 3872545 is about 1967.8782990825. The cubic root of 3872545 is about 157.0358553347.

The spelling of 3872545 in words is "three million, eight hundred seventy-two thousand, five hundred forty-five".