245720 has 16 divisors (see below), whose sum is σ = 552960. Its totient is φ = 98272.

The previous prime is 245719. The next prime is 245723. The reversal of 245720 is 27542.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 245692 and 245701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245723) by changing a digit.

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, 3032 + ... + 3111.

It is an arithmetic number, because the mean of its divisors is an integer number (34560).

2²⁴⁵⁷²⁰ is an apocalyptic number.

245720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245720 is an abundant number, since it is smaller than the sum of its proper divisors (307240).

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

245720 is a wasteful number, since it uses less digits than its factorization.

245720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6154 (or 6150 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 245720 is about 495.7015230963. The cubic root of 245720 is about 62.6344837517.

It can be divided in two parts, 245 and 720, that multiplied together give a square (176400 = 420²).

The spelling of 245720 in words is "two hundred forty-five thousand, seven hundred twenty".