9972451 has 2 divisors, whose sum is σ = 9972452. Its totient is φ = 9972450.

The previous prime is 9972449. The next prime is 9972497. The reversal of 9972451 is 1542799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9972451 - 2¹ = 9972449 is a prime.

Together with 9972449, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9972451.

It is not a weakly prime, because it can be changed into another prime (9972401) 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 as a sum of consecutive naturals, namely, 4986225 + 4986226.

It is an arithmetic number, because the mean of its divisors is an integer number (4986226).

Almost surely, 2^9972451 is an apocalyptic number.

9972451 is a deficient number, since it is larger than the sum of its proper divisors (1).

9972451 is an equidigital number, since it uses as much as digits as its factorization.

9972451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 9972451 is about 3157.9187766629. The cubic root of 9972451 is about 215.2454453090.

The spelling of 9972451 in words is "nine million, nine hundred seventy-two thousand, four hundred fifty-one".