3972586 has 4 divisors (see below), whose sum is σ = 5958882. Its totient is φ = 1986292.

The previous prime is 3972569. The next prime is 3972593. The reversal of 3972586 is 6852793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6852793 = 127 ⋅53959.

It can be written as a sum of positive squares in only one way, i.e., 3010225 + 962361 = 1735^2 + 981^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 3³ + 9 + 7⁶ + 2²¹ + 5⁷ + 8 + 6⁸ .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993145 + ... + 993148.

Almost surely, 2^3972586 is an apocalyptic number.

3972586 is a deficient number, since it is larger than the sum of its proper divisors (1986296).

3972586 is a wasteful number, since it uses less digits than its factorization.

3972586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986295.

The product of its digits is 90720, while the sum is 40.

The square root of 3972586 is about 1993.1347169722. The cubic root of 3972586 is about 158.3766318025.

The spelling of 3972586 in words is "three million, nine hundred seventy-two thousand, five hundred eighty-six".