3865739 has 4 divisors (see below), whose sum is σ = 3931320. Its totient is φ = 3800160.

The previous prime is 3865733. The next prime is 3865747. The reversal of 3865739 is 9375683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9375683 = 19 ⋅493457.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3865739 is a prime.

It is a super-2 number, since 2×3865739² = 29887876032242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3865696 and 3865705.

It is not an unprimeable number, because it can be changed into a prime (3865733) 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, 32702 + ... + 32819.

It is an arithmetic number, because the mean of its divisors is an integer number (982830).

Almost surely, 2^3865739 is an apocalyptic number.

3865739 is a deficient number, since it is larger than the sum of its proper divisors (65581).

3865739 is an equidigital number, since it uses as much as digits as its factorization.

3865739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65580.

The product of its digits is 136080, while the sum is 41.

The square root of 3865739 is about 1966.1482650095. The cubic root of 3865739 is about 156.9438045193.

The spelling of 3865739 in words is "three million, eight hundred sixty-five thousand, seven hundred thirty-nine".