3917842 has 16 divisors (see below), whose sum is σ = 6278400. Its totient is φ = 1829520.

The previous prime is 3917833. The next prime is 3917863. The reversal of 3917842 is 2487193.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3917798 and 3917807.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 709 + ... + 2887.

It is an arithmetic number, because the mean of its divisors is an integer number (392400).

Almost surely, 2^3917842 is an apocalyptic number.

3917842 is a deficient number, since it is larger than the sum of its proper divisors (2360558).

3917842 is a wasteful number, since it uses less digits than its factorization.

3917842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241.

The product of its digits is 12096, while the sum is 34.

The square root of 3917842 is about 1979.3539350000. The cubic root of 3917842 is about 157.6457641067.

The spelling of 3917842 in words is "three million, nine hundred seventeen thousand, eight hundred forty-two".