3948561 has 32 divisors (see below), whose sum is σ = 6336000. Its totient is φ = 2422224.

The previous prime is 3948551. The next prime is 3948569. The reversal of 3948561 is 1658493.

3948561 is a `hidden beast` number, since 3 + 94 + 8 + 561 = 666.

It is not a de Polignac number, because 3948561 - 2¹³ = 3940369 is a prime.

It is a super-2 number, since 2×3948561² = 31182267941442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3948569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21970 + ... + 22148.

It is an arithmetic number, because the mean of its divisors is an integer number (198000).

Almost surely, 2^3948561 is an apocalyptic number.

It is an amenable number.

3948561 is a deficient number, since it is larger than the sum of its proper divisors (2387439).

3948561 is a wasteful number, since it uses less digits than its factorization.

3948561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 244 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 3948561 is about 1987.0986387193. The cubic root of 3948561 is about 158.0567146714.

The spelling of 3948561 in words is "three million, nine hundred forty-eight thousand, five hundred sixty-one".