545090 has 32 divisors (see below), whose sum is σ = 1209600. Its totient is φ = 172224.

The previous prime is 545089. The next prime is 545093. The reversal of 545090 is 90545.

545090 is nontrivially palindromic in base 8.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545093) 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, 611 + ... + 1209.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2⁵⁴⁵⁰⁹⁰ is an apocalyptic number.

545090 is an abundant number, since it is smaller than the sum of its proper divisors (664510).

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

545090 is a wasteful number, since it uses less digits than its factorization.

545090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 545090 is about 738.3021061869. The cubic root of 545090 is about 81.6875877725.

The spelling of 545090 in words is "five hundred forty-five thousand, ninety".