3875521 has 8 divisors (see below), whose sum is σ = 4194344. Its totient is φ = 3559680.

The previous prime is 3875467. The next prime is 3875537. The reversal of 3875521 is 1255783.

It can be written as a sum of positive squares in 4 ways, for example, as 774400 + 3101121 = 880^2 + 1761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3875521 - 2¹⁷ = 3744449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3875551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2515 + ... + 3751.

It is an arithmetic number, because the mean of its divisors is an integer number (524293).

Almost surely, 2^3875521 is an apocalyptic number.

It is an amenable number.

3875521 is a deficient number, since it is larger than the sum of its proper divisors (318823).

3875521 is a wasteful number, since it uses less digits than its factorization.

3875521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491.

The product of its digits is 8400, while the sum is 31.

The square root of 3875521 is about 1968.6342981875. The cubic root of 3875521 is about 157.0760716990.

The spelling of 3875521 in words is "three million, eight hundred seventy-five thousand, five hundred twenty-one".