3942859 has 4 divisors (see below), whose sum is σ = 4070080. Its totient is φ = 3815640.

The previous prime is 3942839. The next prime is 3942871. The reversal of 3942859 is 9582493.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9582493 = 349 ⋅27457.

It is a cyclic number.

It is not a de Polignac number, because 3942859 - 2¹⁵ = 3910091 is a prime.

It is a super-2 number, since 2×3942859² = 31092274187762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3942839) 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, 63564 + ... + 63625.

It is an arithmetic number, because the mean of its divisors is an integer number (1017520).

Almost surely, 2^3942859 is an apocalyptic number.

3942859 is a deficient number, since it is larger than the sum of its proper divisors (127221).

3942859 is a wasteful number, since it uses less digits than its factorization.

3942859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127220.

The product of its digits is 77760, while the sum is 40.

The square root of 3942859 is about 1985.6633652258. The cubic root of 3942859 is about 157.9805963460.

The spelling of 3942859 in words is "three million, nine hundred forty-two thousand, eight hundred fifty-nine".