545261 has 8 divisors (see below), whose sum is σ = 576384. Its totient is φ = 514800.

The previous prime is 545257. The next prime is 545267. The reversal of 545261 is 162545.

545261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 545261 - 2² = 545257 is a prime.

It is a super-3 number, since 3×545261³ = 486333920911843743, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3395 + ... + 3551.

It is an arithmetic number, because the mean of its divisors is an integer number (72048).

2⁵⁴⁵²⁶¹ is an apocalyptic number.

It is an amenable number.

545261 is a deficient number, since it is larger than the sum of its proper divisors (31123).

545261 is a wasteful number, since it uses less digits than its factorization.

545261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331.

The product of its digits is 1200, while the sum is 23.

The square root of 545261 is about 738.4179033583. The cubic root of 545261 is about 81.6961289413.

The spelling of 545261 in words is "five hundred forty-five thousand, two hundred sixty-one".