245217 has 8 divisors (see below), whose sum is σ = 373696. Its totient is φ = 140112.

The previous prime is 245209. The next prime is 245251. The reversal of 245217 is 712542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 245217 - 2³ = 245209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 11677 = 245217 / (2 + 4 + 5 + 2 + 1 + 7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245193 and 245202.

It is not an unprimeable number, because it can be changed into a prime (245257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5818 + ... + 5859.

It is an arithmetic number, because the mean of its divisors is an integer number (46712).

2²⁴⁵²¹⁷ is an apocalyptic number.

It is an amenable number.

245217 is a deficient number, since it is larger than the sum of its proper divisors (128479).

245217 is a wasteful number, since it uses less digits than its factorization.

245217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11687.

The product of its digits is 560, while the sum is 21.

The square root of 245217 is about 495.1939014164. The cubic root of 245217 is about 62.5917160116.

Adding to 245217 its reverse (712542), we get a palindrome (957759).

The spelling of 245217 in words is "two hundred forty-five thousand, two hundred seventeen".