4211986 has 4 divisors (see below), whose sum is σ = 6317982. Its totient is φ = 2105992.

The previous prime is 4211983. The next prime is 4211993. The reversal of 4211986 is 6891124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4124961 + 87025 = 2031^2 + 295^2 .

It is a super-3 number, since 3×4211986³ (a number of 21 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4211981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052995 + ... + 1052998.

Almost surely, 2^4211986 is an apocalyptic number.

4211986 is a deficient number, since it is larger than the sum of its proper divisors (2105996).

4211986 is a wasteful number, since it uses less digits than its factorization.

4211986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105995.

The product of its digits is 3456, while the sum is 31.

The square root of 4211986 is about 2052.3123543944. The cubic root of 4211986 is about 161.4961994332.

The spelling of 4211986 in words is "four million, two hundred eleven thousand, nine hundred eighty-six".