245740 has 24 divisors (see below), whose sum is σ = 563472. Its totient is φ = 89280.

The previous prime is 245723. The next prime is 245741. The reversal of 245740 is 47542.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (245741) by changing a digit.

245740 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339 + ... + 778.

It is an arithmetic number, because the mean of its divisors is an integer number (23478).

2²⁴⁵⁷⁴⁰ is an apocalyptic number.

245740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245740 is an abundant number, since it is smaller than the sum of its proper divisors (317732).

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

245740 is a wasteful number, since it uses less digits than its factorization.

245740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 245740 is about 495.7216961159. The cubic root of 245740 is about 62.6361830513.

The spelling of 245740 in words is "two hundred forty-five thousand, seven hundred forty".