3744021 has 4 divisors (see below), whose sum is σ = 4992032. Its totient is φ = 2496012.

The previous prime is 3744019. The next prime is 3744023. The reversal of 3744021 is 1204473.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (3744019) and next prime (3744023).

It is not a de Polignac number, because 3744021 - 2¹ = 3744019 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3744023) 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, 624001 + ... + 624006.

It is an arithmetic number, because the mean of its divisors is an integer number (1248008).

Almost surely, 2^3744021 is an apocalyptic number.

It is an amenable number.

3744021 is a deficient number, since it is larger than the sum of its proper divisors (1248011).

3744021 is a wasteful number, since it uses less digits than its factorization.

3744021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248010.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 3744021 is about 1934.9472861037. The cubic root of 3744021 is about 155.2790118507.

Adding to 3744021 its reverse (1204473), we get a palindrome (4948494).

The spelling of 3744021 in words is "three million, seven hundred forty-four thousand, twenty-one".