4721565 has 8 divisors (see below), whose sum is σ = 7554528. Its totient is φ = 2518160.

The previous prime is 4721531. The next prime is 4721569. The reversal of 4721565 is 5651274.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4721565 - 2¹² = 4717469 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4721569) 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, 157371 + ... + 157400.

It is an arithmetic number, because the mean of its divisors is an integer number (944316).

Almost surely, 2^4721565 is an apocalyptic number.

It is an amenable number.

4721565 is a deficient number, since it is larger than the sum of its proper divisors (2832963).

4721565 is a wasteful number, since it uses less digits than its factorization.

4721565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314779.

The product of its digits is 8400, while the sum is 30.

The square root of 4721565 is about 2172.9162432087. The cubic root of 4721565 is about 167.7626679991.

It can be divided in two parts, 47 and 21565, that added together give a palindrome (21612).

The spelling of 4721565 in words is "four million, seven hundred twenty-one thousand, five hundred sixty-five".