8455945 has 4 divisors (see below), whose sum is σ = 10147140. Its totient is φ = 6764752.

The previous prime is 8455913. The next prime is 8455981. The reversal of 8455945 is 5495548.

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 1628176 + 6827769 = 1276^2 + 2613^2 .

It is a cyclic number.

It is not a de Polignac number, because 8455945 - 2⁵ = 8455913 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

8455945 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8455898 and 8455907.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845590 + ... + 845599.

It is an arithmetic number, because the mean of its divisors is an integer number (2536785).

Almost surely, 2^8455945 is an apocalyptic number.

It is an amenable number.

8455945 is a deficient number, since it is larger than the sum of its proper divisors (1691195).

8455945 is a wasteful number, since it uses less digits than its factorization.

8455945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691194.

The product of its digits is 144000, while the sum is 40.

The square root of 8455945 is about 2907.9107620421. The cubic root of 8455945 is about 203.7295612253.

The spelling of 8455945 in words is "eight million, four hundred fifty-five thousand, nine hundred forty-five".