3871642 has 8 divisors (see below), whose sum is σ = 5818932. Its totient is φ = 1932000.

The previous prime is 3871619. The next prime is 3871657. The reversal of 3871642 is 2461783.

It can be written as a sum of positive squares in 2 ways, for example, as 3463321 + 408321 = 1861^2 + 639^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×3871642² = 29979223552328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409 + ... + 2812.

Almost surely, 2^3871642 is an apocalyptic number.

3871642 is a deficient number, since it is larger than the sum of its proper divisors (1947290).

3871642 is a wasteful number, since it uses less digits than its factorization.

3871642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824.

The product of its digits is 8064, while the sum is 31.

The square root of 3871642 is about 1967.6488507861. The cubic root of 3871642 is about 157.0236485128.

The spelling of 3871642 in words is "three million, eight hundred seventy-one thousand, six hundred forty-two".