3764021 has 4 divisors (see below), whose sum is σ = 3985452. Its totient is φ = 3542592.

The previous prime is 3764009. The next prime is 3764041. The reversal of 3764021 is 1204673.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1204673 = 277 ⋅4349.

It can be written as a sum of positive squares in 2 ways, for example, as 2102500 + 1661521 = 1450^2 + 1289^2 .

It is a cyclic number.

It is not a de Polignac number, because 3764021 - 2¹⁴ = 3747637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3764041) 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, 110690 + ... + 110723.

It is an arithmetic number, because the mean of its divisors is an integer number (996363).

Almost surely, 2^3764021 is an apocalyptic number.

It is an amenable number.

3764021 is a deficient number, since it is larger than the sum of its proper divisors (221431).

3764021 is a wasteful number, since it uses less digits than its factorization.

3764021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221430.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 3764021 is about 1940.1085021204. The cubic root of 3764021 is about 155.5550133957. Note that the first 3 decimals are identical.

Adding to 3764021 its reverse (1204673), we get a palindrome (4968694).

The spelling of 3764021 in words is "three million, seven hundred sixty-four thousand, twenty-one".