4721649 has 8 divisors (see below), whose sum is σ = 6358272. Its totient is φ = 3116400.

The previous prime is 4721627. The next prime is 4721653. The reversal of 4721649 is 9461274.

It is a happy number.

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

It is not a de Polignac number, because 4721649 - 2⁵ = 4721617 is a prime.

It is a d-powerful number, because it can be written as 4⁵ + 7 + 2¹⁹ + 1 + 6⁴ + 4¹¹ + 9³ .

It is not an unprimeable number, because it can be changed into a prime (4721609) 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, 7489 + ... + 8094.

It is an arithmetic number, because the mean of its divisors is an integer number (794784).

Almost surely, 2^4721649 is an apocalyptic number.

It is an amenable number.

4721649 is a deficient number, since it is larger than the sum of its proper divisors (1636623).

4721649 is a wasteful number, since it uses less digits than its factorization.

4721649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15687.

The product of its digits is 12096, while the sum is 33.

The square root of 4721649 is about 2172.9355719855. The cubic root of 4721649 is about 167.7636628656.

The spelling of 4721649 in words is "four million, seven hundred twenty-one thousand, six hundred forty-nine".