8209745 has 16 divisors (see below), whose sum is σ = 10214400. Its totient is φ = 6329664.

The previous prime is 8209741. The next prime is 8209763. The reversal of 8209745 is 5479028.

It is a happy number.

It is not a de Polignac number, because 8209745 - 2² = 8209741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8209741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36704 + ... + 36926.

It is an arithmetic number, because the mean of its divisors is an integer number (638400).

Almost surely, 2^8209745 is an apocalyptic number.

It is an amenable number.

8209745 is a deficient number, since it is larger than the sum of its proper divisors (2004655).

8209745 is a wasteful number, since it uses less digits than its factorization.

8209745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 8209745 is about 2865.2652582265. The cubic root of 8209745 is about 201.7328183441.

The spelling of 8209745 in words is "eight million, two hundred nine thousand, seven hundred forty-five".