3726521 has 4 divisors (see below), whose sum is σ = 3740544. Its totient is φ = 3712500.

The previous prime is 3726511. The next prime is 3726523. The reversal of 3726521 is 1256273.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1256273 = 919 ⋅1367.

It is a cyclic number.

It is not a de Polignac number, because 3726521 - 2¹⁴ = 3710137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3726523) 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, 6605 + ... + 7146.

It is an arithmetic number, because the mean of its divisors is an integer number (935136).

Almost surely, 2^3726521 is an apocalyptic number.

It is an amenable number.

3726521 is a deficient number, since it is larger than the sum of its proper divisors (14023).

3726521 is a wasteful number, since it uses less digits than its factorization.

3726521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14022.

The product of its digits is 2520, while the sum is 26.

The square root of 3726521 is about 1930.4199025083. The cubic root of 3726521 is about 155.0367030668.

The spelling of 3726521 in words is "three million, seven hundred twenty-six thousand, five hundred twenty-one".