4921205 has 4 divisors (see below), whose sum is σ = 5905452. Its totient is φ = 3936960.

The previous prime is 4921201. The next prime is 4921243. The reversal of 4921205 is 5021294.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1684804 + 3236401 = 1298^2 + 1799^2 .

It is not a de Polignac number, because 4921205 - 2² = 4921201 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4921201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492116 + ... + 492125.

It is an arithmetic number, because the mean of its divisors is an integer number (1476363).

Almost surely, 2^4921205 is an apocalyptic number.

It is an amenable number.

4921205 is a deficient number, since it is larger than the sum of its proper divisors (984247).

4921205 is an equidigital number, since it uses as much as digits as its factorization.

4921205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984246.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 4921205 is about 2218.3789126297. The cubic root of 4921205 is about 170.0945840441.

Adding to 4921205 its reverse (5021294), we get a palindrome (9942499).

The spelling of 4921205 in words is "four million, nine hundred twenty-one thousand, two hundred five".