3965842 has 4 divisors (see below), whose sum is σ = 5948766. Its totient is φ = 1982920.

The previous prime is 3965839. The next prime is 3965849. The reversal of 3965842 is 2485693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2485693 = 7 ⋅355099.

It can be written as a sum of positive squares in only one way, i.e., 3171961 + 793881 = 1781^2 + 891^2 .

It is not an unprimeable number, because it can be changed into a prime (3965849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991459 + ... + 991462.

Almost surely, 2^3965842 is an apocalyptic number.

3965842 is a deficient number, since it is larger than the sum of its proper divisors (1982924).

3965842 is a wasteful number, since it uses less digits than its factorization.

3965842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982923.

The product of its digits is 51840, while the sum is 37.

The square root of 3965842 is about 1991.4421909762. The cubic root of 3965842 is about 158.2869591489.

The spelling of 3965842 in words is "three million, nine hundred sixty-five thousand, eight hundred forty-two".