4721405 has 16 divisors (see below), whose sum is σ = 6424320. Its totient is φ = 3302208.

The previous prime is 4721383. The next prime is 4721407. The reversal of 4721405 is 5041274.

It is not a de Polignac number, because 4721405 - 2⁶ = 4721341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4721407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 677 + ... + 3146.

It is an arithmetic number, because the mean of its divisors is an integer number (401520).

Almost surely, 2^4721405 is an apocalyptic number.

It is an amenable number.

4721405 is a deficient number, since it is larger than the sum of its proper divisors (1702915).

4721405 is a wasteful number, since it uses less digits than its factorization.

4721405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3860.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 4721405 is about 2172.8794260152. The cubic root of 4721405 is about 167.7607729827.

Adding to 4721405 its reverse (5041274), we get a palindrome (9762679).

The spelling of 4721405 in words is "four million, seven hundred twenty-one thousand, four hundred five".