9906451 has 4 divisors (see below), whose sum is σ = 9919312. Its totient is φ = 9893592.

The previous prime is 9906443. The next prime is 9906473. The reversal of 9906451 is 1546099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1546099 = 17 ⋅90947.

It is a cyclic number.

It is not a de Polignac number, because 9906451 - 2³ = 9906443 is a prime.

It is a Duffinian number.

9906451 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9906401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5196 + ... + 6841.

It is an arithmetic number, because the mean of its divisors is an integer number (2479828).

Almost surely, 2^9906451 is an apocalyptic number.

9906451 is a deficient number, since it is larger than the sum of its proper divisors (12861).

9906451 is a wasteful number, since it uses less digits than its factorization.

9906451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12860.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 9906451 is about 3147.4515087607. The cubic root of 9906451 is about 214.7695457496.

The spelling of 9906451 in words is "nine million, nine hundred six thousand, four hundred fifty-one".