4245 has 8 divisors (see below), whose sum is σ = 6816.
Its totient is φ = 2256.
The previous prime is 4243. The next prime is 4253. The reversal of 4245 is 5424.
4245 = T24 + T25 + ... +
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 4245 - 21 = 4243 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 283 = 4245 / (4 + 2 + 4 + 5).
It is a d-powerful number, because it can be written as 42 + 46 + 27 + 5 .
It is a plaindrome in base 12.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (4241) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127 + ... + 156.
It is an arithmetic number, because the mean of its divisors is an integer number (852).
24245 is an apocalyptic number.
It is an amenable number.
4245 is a deficient number, since it is larger than the sum of its proper divisors (2571).
4245 is a wasteful number, since it uses less digits than its factorization.
4245 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 291.
The product of its digits is 160, while the sum is 15.
The square root of 4245 is about 65.1536645170.
The cubic root of 4245 is about 16.1917043337.
Adding to 4245 its reverse (5424), we get a palindrome (9669).
The spelling of 4245 in words is "four thousand, two hundred forty-five".