245420 has 24 divisors (see below), whose sum is σ = 589344. Its totient is φ = 84096.

The previous prime is 245419. The next prime is 245437. The reversal of 245420 is 24542.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 737 + ... + 1016.

It is an arithmetic number, because the mean of its divisors is an integer number (24556).

2²⁴⁵⁴²⁰ is an apocalyptic number.

245420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245420 is an abundant number, since it is smaller than the sum of its proper divisors (343924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245420 is a wasteful number, since it uses less digits than its factorization.

245420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769 (or 1767 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 245420 is about 495.3988292275. The cubic root of 245420 is about 62.6089831855.

Adding to 245420 its reverse (24542), we get a palindrome (269962).

The spelling of 245420 in words is "two hundred forty-five thousand, four hundred twenty".