3870145 has 8 divisors (see below), whose sum is σ = 4720680. Its totient is φ = 3045120.

The previous prime is 3870077. The next prime is 3870149. The reversal of 3870145 is 5410783.

3870145 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 156816 + 3713329 = 396^2 + 1927^2 .

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

It is not a de Polignac number, because 3870145 - 2¹¹ = 3868097 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3870149) 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, 6040 + ... + 6649.

It is an arithmetic number, because the mean of its divisors is an integer number (590085).

Almost surely, 2^3870145 is an apocalyptic number.

It is an amenable number.

3870145 is a deficient number, since it is larger than the sum of its proper divisors (850535).

3870145 is a wasteful number, since it uses less digits than its factorization.

3870145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12755.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 3870145 is about 1967.2684107666. The cubic root of 3870145 is about 157.0034077722.

The spelling of 3870145 in words is "three million, eight hundred seventy thousand, one hundred forty-five".