3921743 has 4 divisors (see below), whose sum is σ = 4482000. Its totient is φ = 3361488.

The previous prime is 3921721. The next prime is 3921761. The reversal of 3921743 is 3471293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3471293 = 7 ⋅495899.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3921743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921143) 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, 280118 + ... + 280131.

It is an arithmetic number, because the mean of its divisors is an integer number (1120500).

Almost surely, 2^3921743 is an apocalyptic number.

3921743 is a deficient number, since it is larger than the sum of its proper divisors (560257).

3921743 is an equidigital number, since it uses as much as digits as its factorization.

3921743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560256.

The product of its digits is 4536, while the sum is 29.

The square root of 3921743 is about 1980.3391123744. The cubic root of 3921743 is about 157.6980694428.

It can be divided in two parts, 3921 and 743, that added together give a palindrome (4664).

The spelling of 3921743 in words is "three million, nine hundred twenty-one thousand, seven hundred forty-three".