3863521 has 2 divisors, whose sum is σ = 3863522. Its totient is φ = 3863520.

The previous prime is 3863513. The next prime is 3863533. The reversal of 3863521 is 1253683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3651921 + 211600 = 1911^2 + 460^2 .

It is an emirp because it is prime and its reverse (1253683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3863521 - 2³ = 3863513 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 3863521.

It is not a weakly prime, because it can be changed into another prime (3863501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1931760 + 1931761.

It is an arithmetic number, because the mean of its divisors is an integer number (1931761).

Almost surely, 2^3863521 is an apocalyptic number.

It is an amenable number.

3863521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3863521 is an equidigital number, since it uses as much as digits as its factorization.

3863521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 28.

The square root of 3863521 is about 1965.5841370951. The cubic root of 3863521 is about 156.9137828378.

The spelling of 3863521 in words is "three million, eight hundred sixty-three thousand, five hundred twenty-one".