3782521 has 2 divisors, whose sum is σ = 3782522. Its totient is φ = 3782520.

The previous prime is 3782509. The next prime is 3782531. The reversal of 3782521 is 1252873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3474496 + 308025 = 1864^2 + 555^2 .

It is an emirp because it is prime and its reverse (1252873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3782521 - 2¹¹ = 3780473 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3782521.

It is not a weakly prime, because it can be changed into another prime (3782531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1891260 + 1891261.

It is an arithmetic number, because the mean of its divisors is an integer number (1891261).

Almost surely, 2^3782521 is an apocalyptic number.

It is an amenable number.

3782521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3782521 is an equidigital number, since it uses as much as digits as its factorization.

3782521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 28.

The square root of 3782521 is about 1944.8704327024. The cubic root of 3782521 is about 155.8094457238.

The spelling of 3782521 in words is "three million, seven hundred eighty-two thousand, five hundred twenty-one".