9372421 has 2 divisors, whose sum is σ = 9372422. Its totient is φ = 9372420.

The previous prime is 9372401. The next prime is 9372427. The reversal of 9372421 is 1242739.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9235521 + 136900 = 3039^2 + 370^2 .

It is an emirp because it is prime and its reverse (1242739) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9372421 - 2⁹ = 9371909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9372421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9372427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4686210 + 4686211.

It is an arithmetic number, because the mean of its divisors is an integer number (4686211).

Almost surely, 2^9372421 is an apocalyptic number.

It is an amenable number.

9372421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9372421 is an equidigital number, since it uses as much as digits as its factorization.

9372421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 9372421 is about 3061.4410005747. The cubic root of 9372421 is about 210.8388293269.

The spelling of 9372421 in words is "nine million, three hundred seventy-two thousand, four hundred twenty-one".