545454 has 80 divisors (see below), whose sum is σ = 1544928. Its totient is φ = 139968.

The previous prime is 545449. The next prime is 545473. The reversal of 545454 is 454545.

545454 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a super-2 number, since 2×545454² = 595040132232, which contains 22 as substring.

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

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

545454 is an undulating number in base 10.

545454 is a modest number, since divided by 5454 gives 54 as remainder.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 14724 + ... + 14760.

2⁵⁴⁵⁴⁵⁴ is an apocalyptic number.

545454 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 545454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (772464).

545454 is an abundant number, since it is smaller than the sum of its proper divisors (999474).

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

545454 is a wasteful number, since it uses less digits than its factorization.

545454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 62 counting only the distinct ones).

The product of its digits is 8000, while the sum is 27.

The square root of 545454 is about 738.5485766014. The cubic root of 545454 is about 81.7057668291.

545454 divided by its sum of digits (27) gives a palindrome (20202).

Adding to 545454 its reverse (454545), we get a palindrome (999999).

Subtracting from 545454 its reverse (454545), we obtain a palindrome (90909).

It can be divided in two parts, 545 and 454, that added together give a palindrome (999).

The spelling of 545454 in words is "five hundred forty-five thousand, four hundred fifty-four".