265740 has 48 divisors (see below), whose sum is σ = 768768. Its totient is φ = 68544.

The previous prime is 265739. The next prime is 265747. The reversal of 265740 is 47562.

It is a happy number.

It is a plaindrome in base 9.

It is a zygodrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 265740.

It is not an unprimeable number, because it can be changed into a prime (265747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2529 + ... + 2631.

It is an arithmetic number, because the mean of its divisors is an integer number (16016).

2²⁶⁵⁷⁴⁰ is an apocalyptic number.

265740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is a pronic number, being equal to 515×516.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384384).

265740 is an abundant number, since it is smaller than the sum of its proper divisors (503028).

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

265740 is a wasteful number, since it uses less digits than its factorization.

265740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 265740 is about 515.4997575169. The cubic root of 265740 is about 64.2913152087.

The spelling of 265740 in words is "two hundred sixty-five thousand, seven hundred forty".