8424145 has 4 divisors (see below), whose sum is σ = 10108980. Its totient is φ = 6739312.

The previous prime is 8424137. The next prime is 8424151. The reversal of 8424145 is 5414248.

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 6713281 + 1710864 = 2591^2 + 1308^2 .

It is a cyclic number.

It is not a de Polignac number, because 8424145 - 2³ = 8424137 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 842410 + ... + 842419.

It is an arithmetic number, because the mean of its divisors is an integer number (2527245).

Almost surely, 2^8424145 is an apocalyptic number.

It is an amenable number.

8424145 is a deficient number, since it is larger than the sum of its proper divisors (1684835).

8424145 is a wasteful number, since it uses less digits than its factorization.

8424145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684834.

The product of its digits is 5120, while the sum is 28.

The square root of 8424145 is about 2902.4377684974. The cubic root of 8424145 is about 203.4738540140.

The spelling of 8424145 in words is "eight million, four hundred twenty-four thousand, one hundred forty-five".