3958642 has 4 divisors (see below), whose sum is σ = 5937966. Its totient is φ = 1979320.

The previous prime is 3958627. The next prime is 3958657. The reversal of 3958642 is 2468593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2468593 = 89 ⋅27737.

It is an interprime number because it is at equal distance from previous prime (3958627) and next prime (3958657).

It can be written as a sum of positive squares in only one way, i.e., 2368521 + 1590121 = 1539^2 + 1261^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989659 + ... + 989662.

Almost surely, 2^3958642 is an apocalyptic number.

3958642 is a deficient number, since it is larger than the sum of its proper divisors (1979324).

3958642 is a wasteful number, since it uses less digits than its factorization.

3958642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979323.

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

The square root of 3958642 is about 1989.6336346172. The cubic root of 3958642 is about 158.1911109455.

The spelling of 3958642 in words is "three million, nine hundred fifty-eight thousand, six hundred forty-two".