545421 has 8 divisors (see below), whose sum is σ = 730944. Its totient is φ = 361760.
The previous prime is 545387. The next prime is 545429. The reversal of 545421 is 124545.
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 545421 - 214 = 529037 is a prime.
545421 is a lucky number.
It is a plaindrome in base 12.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (545429) 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, 520 + ... + 1166.
It is an arithmetic number, because the mean of its divisors is an integer number (91368).
2545421 is an apocalyptic number.
It is an amenable number.
545421 is a deficient number, since it is larger than the sum of its proper divisors (185523).
545421 is a wasteful number, since it uses less digits than its factorization.
545421 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 931.
The product of its digits is 800, while the sum is 21.
The square root of 545421 is about 738.5262351467. The cubic root of 545421 is about 81.7041190612.
Adding to 545421 its reverse (124545), we get a palindrome (669966).
The spelling of 545421 in words is "five hundred forty-five thousand, four hundred twenty-one".
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