275240 has 32 divisors (see below), whose sum is σ = 708480. Its totient is φ = 94272.

The previous prime is 275227. The next prime is 275251. The reversal of 275240 is 42572.

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

It is a plaindrome in base 12.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212 + ... + 771.

It is an arithmetic number, because the mean of its divisors is an integer number (22140).

2²⁷⁵²⁴⁰ is an apocalyptic number.

275240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

275240 is an abundant number, since it is smaller than the sum of its proper divisors (433240).

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

275240 is a wasteful number, since it uses less digits than its factorization.

275240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001 (or 997 counting only the distinct ones).

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

The square root of 275240 is about 524.6332052015. The cubic root of 275240 is about 65.0484845357.

It can be divided in two parts, 275 and 240, that added together give a palindrome (515).

The spelling of 275240 in words is "two hundred seventy-five thousand, two hundred forty".