4721491 has 2 divisors, whose sum is σ = 4721492. Its totient is φ = 4721490.

The previous prime is 4721477. The next prime is 4721513. The reversal of 4721491 is 1941274.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4721491 - 2¹¹ = 4719443 is a prime.

It is not a weakly prime, because it can be changed into another prime (4721411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2360745 + 2360746.

It is an arithmetic number, because the mean of its divisors is an integer number (2360746).

Almost surely, 2^4721491 is an apocalyptic number.

4721491 is a deficient number, since it is larger than the sum of its proper divisors (1).

4721491 is an equidigital number, since it uses as much as digits as its factorization.

4721491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The square root of 4721491 is about 2172.8992153342. The cubic root of 4721491 is about 167.7617915593.

The spelling of 4721491 in words is "four million, seven hundred twenty-one thousand, four hundred ninety-one".