545240 has 32 divisors (see below), whose sum is σ = 1259280. Its totient is φ = 212352.

The previous prime is 545239. The next prime is 545257. The reversal of 545240 is 42545.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1562 + ... + 1878.

2⁵⁴⁵²⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 545240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (629640).

545240 is an abundant number, since it is smaller than the sum of its proper divisors (714040).

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

545240 is a wasteful number, since it uses less digits than its factorization.

545240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 545240 is about 738.4036836311. The cubic root of 545240 is about 81.6950801220.

Adding to 545240 its reverse (42545), we get a palindrome (587785).

The spelling of 545240 in words is "five hundred forty-five thousand, two hundred forty".