2917985 has 16 divisors (see below), whose sum is σ = 4029696. Its totient is φ = 1987008.

The previous prime is 2917973. The next prime is 2918059. The reversal of 2917985 is 5897192.

It is a cyclic number.

It is not a de Polignac number, because 2917985 - 2⁴ = 2917969 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9047 + ... + 9363.

It is an arithmetic number, because the mean of its divisors is an integer number (251856).

2^2917985 is an apocalyptic number.

It is an amenable number.

2917985 is a deficient number, since it is larger than the sum of its proper divisors (1111711).

2917985 is a wasteful number, since it uses less digits than its factorization.

2917985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592.

The product of its digits is 45360, while the sum is 41.

The square root of 2917985 is about 1708.2110525342. The cubic root of 2917985 is about 142.8985049279.

The spelling of 2917985 in words is "two million, nine hundred seventeen thousand, nine hundred eighty-five".