3851947 has 8 divisors (see below), whose sum is σ = 4253760. Its totient is φ = 3458760.

The previous prime is 3851923. The next prime is 3851977. The reversal of 3851947 is 7491583.

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 3851947 - 2⁷ = 3851819 is a prime.

It is an Ulam number.

It is a Duffinian number.

3851947 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3851917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1197 + ... + 3022.

It is an arithmetic number, because the mean of its divisors is an integer number (531720).

Almost surely, 2^3851947 is an apocalyptic number.

3851947 is a deficient number, since it is larger than the sum of its proper divisors (401813).

3851947 is a wasteful number, since it uses less digits than its factorization.

3851947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4313.

The product of its digits is 30240, while the sum is 37.

The square root of 3851947 is about 1962.6377658651. The cubic root of 3851947 is about 156.7569365594.

It can be divided in two parts, 385 and 1947, that added together give a palindrome (2332).

The spelling of 3851947 in words is "three million, eight hundred fifty-one thousand, nine hundred forty-seven".