16870745 has 8 divisors (see below), whose sum is σ = 20267016. Its totient is φ = 13481856.

The previous prime is 16870741. The next prime is 16870757. The reversal of 16870745 is 54707861.

It can be written as a sum of positive squares in 4 ways, for example, as 2347024 + 14523721 = 1532^2 + 3811^2 .

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 16870745 - 2² = 16870741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16870699 and 16870708.

It is not an unprimeable number, because it can be changed into a prime (16870741) 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, 7469 + ... + 9461.

It is an arithmetic number, because the mean of its divisors is an integer number (2533377).

Almost surely, 2^16870745 is an apocalyptic number.

It is an amenable number.

16870745 is a deficient number, since it is larger than the sum of its proper divisors (3396271).

16870745 is a wasteful number, since it uses less digits than its factorization.

16870745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3691.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 16870745 is about 4107.4012465305. The cubic root of 16870745 is about 256.4748318259.

The spelling of 16870745 in words is "sixteen million, eight hundred seventy thousand, seven hundred forty-five".