3948457 has 4 divisors (see below), whose sum is σ = 4015440. Its totient is φ = 3881476.

The previous prime is 3948431. The next prime is 3948463. The reversal of 3948457 is 7548493.

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: 7548493 = 17 ⋅444029.

It is a cyclic number.

It is not a de Polignac number, because 3948457 - 2¹⁵ = 3915689 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3948467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33403 + ... + 33520.

It is an arithmetic number, because the mean of its divisors is an integer number (1003860).

Almost surely, 2^3948457 is an apocalyptic number.

It is an amenable number.

3948457 is a deficient number, since it is larger than the sum of its proper divisors (66983).

3948457 is an equidigital number, since it uses as much as digits as its factorization.

3948457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66982.

The product of its digits is 120960, while the sum is 40.

The square root of 3948457 is about 1987.0724697403. The cubic root of 3948457 is about 158.0553269893.

The spelling of 3948457 in words is "three million, nine hundred forty-eight thousand, four hundred fifty-seven".