3851731 has 4 divisors (see below), whose sum is σ = 4148032. Its totient is φ = 3555432.

The previous prime is 3851713. The next prime is 3851747. The reversal of 3851731 is 1371583.

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

It is a cyclic number.

It is not a de Polignac number, because 3851731 - 2¹¹ = 3849683 is a prime.

It is a super-2 number, since 2×3851731² = 29671663392722, which contains 22 as substring.

It is a Duffinian number.

3851731 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3851731.

It is not an unprimeable number, because it can be changed into a prime (3851761) 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 3 ways as a sum of consecutive naturals, for example, 148131 + ... + 148156.

It is an arithmetic number, because the mean of its divisors is an integer number (1037008).

Almost surely, 2^3851731 is an apocalyptic number.

3851731 is a deficient number, since it is larger than the sum of its proper divisors (296301).

3851731 is a wasteful number, since it uses less digits than its factorization.

3851731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296300.

The product of its digits is 2520, while the sum is 28.

The square root of 3851731 is about 1962.5827371094. The cubic root of 3851731 is about 156.7540064281.

It can be divided in two parts, 385 and 1731, that multiplied together give a triangular number (666435 = T₁₁₅₄).

The spelling of 3851731 in words is "three million, eight hundred fifty-one thousand, seven hundred thirty-one".