8429945 has 4 divisors (see below), whose sum is σ = 10115940. Its totient is φ = 6743952.

The previous prime is 8429917. The next prime is 8429947. The reversal of 8429945 is 5499248.

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 3888784 + 4541161 = 1972^2 + 2131^2 .

It is a cyclic number.

It is not a de Polignac number, because 8429945 - 2⁸ = 8429689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8429947) 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, 842990 + ... + 842999.

It is an arithmetic number, because the mean of its divisors is an integer number (2528985).

Almost surely, 2^8429945 is an apocalyptic number.

It is an amenable number.

8429945 is a deficient number, since it is larger than the sum of its proper divisors (1685995).

8429945 is a wasteful number, since it uses less digits than its factorization.

8429945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685994.

The product of its digits is 103680, while the sum is 41.

The square root of 8429945 is about 2903.4367566730. The cubic root of 8429945 is about 203.5205403588.

The spelling of 8429945 in words is "eight million, four hundred twenty-nine thousand, nine hundred forty-five".