3865427 has 4 divisors (see below), whose sum is σ = 3969936. Its totient is φ = 3760920.

The previous prime is 3865363. The next prime is 3865429. The reversal of 3865427 is 7245683.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7245683 = 53 ⋅136711.

It is a cyclic number.

It is not a de Polignac number, because 3865427 - 2⁶ = 3865363 is a prime.

It is a d-powerful number, because it can be written as 3¹² + 8⁵ + 6 + 5⁹ + 4⁴ + 2¹⁹ + 7⁷ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3865429) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52199 + ... + 52272.

It is an arithmetic number, because the mean of its divisors is an integer number (992484).

Almost surely, 2^3865427 is an apocalyptic number.

3865427 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

3865427 is a deficient number, since it is larger than the sum of its proper divisors (104509).

3865427 is a wasteful number, since it uses less digits than its factorization.

3865427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104508.

The product of its digits is 40320, while the sum is 35.

The square root of 3865427 is about 1966.0689204603. The cubic root of 3865427 is about 156.9395821456.

The spelling of 3865427 in words is "three million, eight hundred sixty-five thousand, four hundred twenty-seven".