9972401 has 2 divisors, whose sum is σ = 9972402. Its totient is φ = 9972400.

The previous prime is 9972383. The next prime is 9972439. The reversal of 9972401 is 1042799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6553600 + 3418801 = 2560^2 + 1849^2 .

It is an emirp because it is prime and its reverse (1042799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9972401 - 2¹⁴ = 9956017 is a prime.

It is not a weakly prime, because it can be changed into another prime (9972451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4986200 + 4986201.

It is an arithmetic number, because the mean of its divisors is an integer number (4986201).

Almost surely, 2^9972401 is an apocalyptic number.

It is an amenable number.

9972401 is a deficient number, since it is larger than the sum of its proper divisors (1).

9972401 is an equidigital number, since it uses as much as digits as its factorization.

9972401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 9972401 is about 3157.9108600466. The cubic root of 9972401 is about 215.2450855749.

The spelling of 9972401 in words is "nine million, nine hundred seventy-two thousand, four hundred one".