4194987 has 4 divisors (see below), whose sum is σ = 5593320. Its totient is φ = 2796656.

The previous prime is 4194973. The next prime is 4194989. The reversal of 4194987 is 7894914.

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

It is a cyclic number.

It is not a de Polignac number, because 4194987 - 2¹⁰ = 4193963 is a prime.

It is an Ulam number.

It is a D-number.

4194987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4194989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699162 + ... + 699167.

It is an arithmetic number, because the mean of its divisors is an integer number (1398330).

Almost surely, 2^4194987 is an apocalyptic number.

4194987 is a deficient number, since it is larger than the sum of its proper divisors (1398333).

4194987 is a wasteful number, since it uses less digits than its factorization.

4194987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398332.

The product of its digits is 72576, while the sum is 42.

The square root of 4194987 is about 2048.1667412591. The cubic root of 4194987 is about 161.2786476354.

The spelling of 4194987 in words is "four million, one hundred ninety-four thousand, nine hundred eighty-seven".