545401 has 4 divisors (see below), whose sum is σ = 554404. Its totient is φ = 536400.

The previous prime is 545387. The next prime is 545429. The reversal of 545401 is 104545.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 156025 + 389376 = 395^2 + 624^2 .

It is a cyclic number.

It is not a de Polignac number, because 545401 - 2⁹ = 544889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4410 + ... + 4531.

It is an arithmetic number, because the mean of its divisors is an integer number (138601).

2⁵⁴⁵⁴⁰¹ is an apocalyptic number.

It is an amenable number.

545401 is a deficient number, since it is larger than the sum of its proper divisors (9003).

545401 is an equidigital number, since it uses as much as digits as its factorization.

545401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9002.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 545401 is about 738.5126945422. The cubic root of 545401 is about 81.7031203817.

Adding to 545401 its reverse (104545), we get a palindrome (649946).

It can be divided in two parts, 545 and 401, that added together give a triangular number (946 = T₄₃).

The spelling of 545401 in words is "five hundred forty-five thousand, four hundred one".