3865501 has 4 divisors (see below), whose sum is σ = 3970012. Its totient is φ = 3760992.

The previous prime is 3865481. The next prime is 3865513. The reversal of 3865501 is 1055683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1055683 = 17 ⋅62099.

It can be written as a sum of positive squares in 2 ways, for example, as 3709476 + 156025 = 1926^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 3865501 - 2⁵ = 3865469 is a prime.

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 3865501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52200 + ... + 52273.

It is an arithmetic number, because the mean of its divisors is an integer number (992503).

Almost surely, 2^3865501 is an apocalyptic number.

It is an amenable number.

3865501 is a deficient number, since it is larger than the sum of its proper divisors (104511).

3865501 is a wasteful number, since it uses less digits than its factorization.

3865501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104510.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 3865501 is about 1966.0877396495. The cubic root of 3865501 is about 156.9405836266.

The spelling of 3865501 in words is "three million, eight hundred sixty-five thousand, five hundred one".