545618 has 4 divisors (see below), whose sum is σ = 818430. Its totient is φ = 272808.

The previous prime is 545617. The next prime is 545621. The reversal of 545618 is 816545.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 816545 = 5 ⋅163309.

It can be written as a sum of positive squares in only one way, i.e., 508369 + 37249 = 713^2 + 193^2 .

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

It is not an unprimeable number, because it can be changed into a prime (545617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136403 + ... + 136406.

2⁵⁴⁵⁶¹⁸ is an apocalyptic number.

545618 is a deficient number, since it is larger than the sum of its proper divisors (272812).

545618 is a wasteful number, since it uses less digits than its factorization.

545618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272811.

The product of its digits is 4800, while the sum is 29.

The square root of 545618 is about 738.6595968374. The cubic root of 545618 is about 81.7139547502.

The spelling of 545618 in words is "five hundred forty-five thousand, six hundred eighteen".