7165987 has 8 divisors (see below), whose sum is σ = 7484400. Its totient is φ = 6852384.

The previous prime is 7165981. The next prime is 7165997. The reversal of 7165987 is 7895617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7165987 - 2³ = 7165979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7165981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2028 + ... + 4294.

It is an arithmetic number, because the mean of its divisors is an integer number (935550).

Almost surely, 2^7165987 is an apocalyptic number.

7165987 is a deficient number, since it is larger than the sum of its proper divisors (318413).

7165987 is a wasteful number, since it uses less digits than its factorization.

7165987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405.

The product of its digits is 105840, while the sum is 43.

The square root of 7165987 is about 2676.9361217631. The cubic root of 7165987 is about 192.7933302761.

The spelling of 7165987 in words is "seven million, one hundred sixty-five thousand, nine hundred eighty-seven".