3861265 has 8 divisors (see below), whose sum is σ = 4686120. Its totient is φ = 3053952.

The previous prime is 3861259. The next prime is 3861269. The reversal of 3861265 is 5621683.

It can be written as a sum of positive squares in 4 ways, for example, as 3969 + 3857296 = 63^2 + 1964^2 .

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 3861265 - 2⁵ = 3861233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3861269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3894 + ... + 4783.

It is an arithmetic number, because the mean of its divisors is an integer number (585765).

Almost surely, 2^3861265 is an apocalyptic number.

It is an amenable number.

3861265 is a deficient number, since it is larger than the sum of its proper divisors (824855).

3861265 is an equidigital number, since it uses as much as digits as its factorization.

3861265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8771.

The product of its digits is 8640, while the sum is 31.

The square root of 3861265 is about 1965.0101780907. The cubic root of 3861265 is about 156.8832350190.

It can be divided in two parts, 3861 and 265, that multiplied together give a triangular number (1023165 = T₁₄₃₀).

The spelling of 3861265 in words is "three million, eight hundred sixty-one thousand, two hundred sixty-five".