4990721 has 8 divisors (see below), whose sum is σ = 5184000. Its totient is φ = 4799520.

The previous prime is 4990717. The next prime is 4990723. The reversal of 4990721 is 1270994.

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

It is a cyclic number.

It is not a de Polignac number, because 4990721 - 2² = 4990717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4990723) 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, 5765 + ... + 6573.

It is an arithmetic number, because the mean of its divisors is an integer number (648000).

Almost surely, 2^4990721 is an apocalyptic number.

It is an amenable number.

4990721 is a deficient number, since it is larger than the sum of its proper divisors (193279).

4990721 is a wasteful number, since it uses less digits than its factorization.

4990721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 4990721 is about 2233.9921665037. The cubic root of 4990721 is about 170.8917500531.

The spelling of 4990721 in words is "four million, nine hundred ninety thousand, seven hundred twenty-one".