245620 has 12 divisors (see below), whose sum is σ = 515844. Its totient is φ = 98240.

The previous prime is 245593. The next prime is 245621. The reversal of 245620 is 26542.

It can be written as a sum of positive squares in 2 ways, for example, as 156816 + 88804 = 396^2 + 298^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245621) by changing a digit.

245620 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6121 + ... + 6160.

It is an arithmetic number, because the mean of its divisors is an integer number (42987).

2²⁴⁵⁶²⁰ is an apocalyptic number.

245620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245620 is an abundant number, since it is smaller than the sum of its proper divisors (270224).

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

245620 is a wasteful number, since it uses less digits than its factorization.

245620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12290 (or 12288 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 245620 is about 495.6006456816. The cubic root of 245620 is about 62.6259858703.

The spelling of 245620 in words is "two hundred forty-five thousand, six hundred twenty".