4363921 has 3 divisors (see below), whose sum is σ = 4366011.
Its totient is φ = 4361832.
The previous prime is 4363897. The next prime is 4363927. The reversal of 4363921 is 1293634.
The square root of 4363921 is 2089.
It is a perfect power (a square), and thus also a powerful number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It can be written as a sum of positive squares in only one way, i.e., 3845521 + 518400 = 1961^2 + 720^2
It is not a de Polignac number, because 4363921 - 25 = 4363889 is a prime.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 4363921.
It is not an unprimeable number, because it can be changed into a prime (4363927) by changing a digit.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1045 + ... + 3133.
It is an arithmetic number, because the mean of its divisors is an integer number (1455337).
Almost surely, 24363921 is an apocalyptic number.
4363921 is the 2089-th square number.
4363921 is the 1045-th centered octagonal number.
It is an amenable number.
4363921 is a deficient number, since it is larger than the sum of its proper divisors (2090).
4363921 is an frugal number, since it uses more digits than its factorization.
4363921 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4178 (or 2089 counting only the distinct ones).
The product of its digits is 3888, while the sum is 28.
The cubic root of 4363921 is about 163.4151411186.
It can be divided in two parts, 43639 and 21, that added together give a triangular number (43660 = T295).
The spelling of 4363921 in words is "four million, three hundred sixty-three thousand, nine hundred twenty-one".