9720451 has 8 divisors (see below), whose sum is σ = 10712240. Its totient is φ = 8763552.

The previous prime is 9720449. The next prime is 9720463. The reversal of 9720451 is 1540279.

It is a happy number.

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 9720451 - 2¹ = 9720449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9720551) 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, 8136 + ... + 9253.

It is an arithmetic number, because the mean of its divisors is an integer number (1339030).

Almost surely, 2^9720451 is an apocalyptic number.

9720451 is a deficient number, since it is larger than the sum of its proper divisors (991789).

9720451 is a wasteful number, since it uses less digits than its factorization.

9720451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17445.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 9720451 is about 3117.7637819437. The cubic root of 9720451 is about 213.4168989568.

The spelling of 9720451 in words is "nine million, seven hundred twenty thousand, four hundred fifty-one".