7378421 has 2 divisors, whose sum is σ = 7378422. Its totient is φ = 7378420.

The previous prime is 7378387. The next prime is 7378439. The reversal of 7378421 is 1248737.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7349521 + 28900 = 2711^2 + 170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7378421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7378121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3689210 + 3689211.

It is an arithmetic number, because the mean of its divisors is an integer number (3689211).

Almost surely, 2^7378421 is an apocalyptic number.

It is an amenable number.

7378421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7378421 is an equidigital number, since it uses as much as digits as its factorization.

7378421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 32.

The square root of 7378421 is about 2716.3249069285. The cubic root of 7378421 is about 194.6799131824.

The spelling of 7378421 in words is "seven million, three hundred seventy-eight thousand, four hundred twenty-one".