4996721 has 4 divisors (see below), whose sum is σ = 5001444. Its totient is φ = 4992000.

The previous prime is 4996709. The next prime is 4996723. The reversal of 4996721 is 1276994.

4996721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 2 ways, for example, as 2436721 + 2560000 = 1561^2 + 1600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4996721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4996723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41 + ... + 3161.

It is an arithmetic number, because the mean of its divisors is an integer number (1250361).

Almost surely, 2^4996721 is an apocalyptic number.

It is an amenable number.

4996721 is a deficient number, since it is larger than the sum of its proper divisors (4723).

4996721 is a wasteful number, since it uses less digits than its factorization.

4996721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4722.

The product of its digits is 27216, while the sum is 38.

The square root of 4996721 is about 2235.3346505613. The cubic root of 4996721 is about 170.9602064192.

It can be divided in two parts, 49 and 96721, that multiplied together give a square (4739329 = 2177²).

The spelling of 4996721 in words is "four million, nine hundred ninety-six thousand, seven hundred twenty-one".