4165987 has 4 divisors (see below), whose sum is σ = 4761136. Its totient is φ = 3570840.

The previous prime is 4165979. The next prime is 4165991. The reversal of 4165987 is 7895614.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7895614 = 2 ⋅3947807.

It is not a de Polignac number, because 4165987 - 2³ = 4165979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4165927) 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, 297564 + ... + 297577.

It is an arithmetic number, because the mean of its divisors is an integer number (1190284).

Almost surely, 2^4165987 is an apocalyptic number.

4165987 is a deficient number, since it is larger than the sum of its proper divisors (595149).

4165987 is an equidigital number, since it uses as much as digits as its factorization.

4165987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595148.

The product of its digits is 60480, while the sum is 40.

The square root of 4165987 is about 2041.0749618767. The cubic root of 4165987 is about 160.9061474791.

The spelling of 4165987 in words is "four million, one hundred sixty-five thousand, nine hundred eighty-seven".