3871261 has 4 divisors (see below), whose sum is σ = 3965724. Its totient is φ = 3776800.

The previous prime is 3871211. The next prime is 3871271. The reversal of 3871261 is 1621783.

3871261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1279161 + 2592100 = 1131^2 + 1610^2 .

It is a cyclic number.

It is not a de Polignac number, because 3871261 - 2¹¹ = 3869213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3871201) 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 3 ways as a sum of consecutive naturals, for example, 47170 + ... + 47251.

It is an arithmetic number, because the mean of its divisors is an integer number (991431).

Almost surely, 2^3871261 is an apocalyptic number.

It is an amenable number.

3871261 is a deficient number, since it is larger than the sum of its proper divisors (94463).

3871261 is an equidigital number, since it uses as much as digits as its factorization.

3871261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94462.

The product of its digits is 2016, while the sum is 28.

The square root of 3871261 is about 1967.5520323488. The cubic root of 3871261 is about 157.0184975569.

It can be divided in two parts, 3871 and 261, that multiplied together give a triangular number (1010331 = T₁₄₂₁).

The spelling of 3871261 in words is "three million, eight hundred seventy-one thousand, two hundred sixty-one".