545481 has 16 divisors (see below), whose sum is σ = 820800. Its totient is φ = 357984.

The previous prime is 545477. The next prime is 545483. The reversal of 545481 is 184545.

It is not a de Polignac number, because 545481 - 2² = 545477 is a prime.

It is a super-2 number, since 2×545481² = 595099042722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (545483) 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, 2290 + ... + 2516.

It is an arithmetic number, because the mean of its divisors is an integer number (51300).

2⁵⁴⁵⁴⁸¹ is an apocalyptic number.

It is an amenable number.

545481 is a deficient number, since it is larger than the sum of its proper divisors (275319).

545481 is a wasteful number, since it uses less digits than its factorization.

545481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 319 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 545481 is about 738.5668554708. The cubic root of 545481 is about 81.7071149533.

The spelling of 545481 in words is "five hundred forty-five thousand, four hundred eighty-one".