8451745 has 4 divisors (see below), whose sum is σ = 10142100. Its totient is φ = 6761392.

The previous prime is 8451743. The next prime is 8451749. The reversal of 8451745 is 5471548.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2614689 + 5837056 = 1617^2 + 2416^2 .

It is a cyclic number.

It is not a de Polignac number, because 8451745 - 2¹ = 8451743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8451745.

It is not an unprimeable number, because it can be changed into a prime (8451743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845170 + ... + 845179.

It is an arithmetic number, because the mean of its divisors is an integer number (2535525).

Almost surely, 2^8451745 is an apocalyptic number.

It is an amenable number.

8451745 is a deficient number, since it is larger than the sum of its proper divisors (1690355).

8451745 is a wasteful number, since it uses less digits than its factorization.

8451745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690354.

The product of its digits is 22400, while the sum is 34.

The square root of 8451745 is about 2907.1885043801. The cubic root of 8451745 is about 203.6958253600.

The spelling of 8451745 in words is "eight million, four hundred fifty-one thousand, seven hundred forty-five".