4178987 has 4 divisors (see below), whose sum is σ = 4323120. Its totient is φ = 4034856.

The previous prime is 4178983. The next prime is 4179001. The reversal of 4178987 is 7898714.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7898714 = 2 ⋅3949357.

It is a cyclic number.

It is not a de Polignac number, because 4178987 - 2² = 4178983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4178983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72023 + ... + 72080.

It is an arithmetic number, because the mean of its divisors is an integer number (1080780).

Almost surely, 2^4178987 is an apocalyptic number.

4178987 is a deficient number, since it is larger than the sum of its proper divisors (144133).

4178987 is a wasteful number, since it uses less digits than its factorization.

4178987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144132.

The product of its digits is 112896, while the sum is 44.

The square root of 4178987 is about 2044.2570777669. The cubic root of 4178987 is about 161.0733433822.

The spelling of 4178987 in words is "four million, one hundred seventy-eight thousand, nine hundred eighty-seven".