7395821 has 2 divisors, whose sum is σ = 7395822. Its totient is φ = 7395820.

The previous prime is 7395809. The next prime is 7395847. The reversal of 7395821 is 1285937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7022500 + 373321 = 2650^2 + 611^2 .

It is an emirp because it is prime and its reverse (1285937) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7395821 - 2⁶ = 7395757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7395851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3697910 + 3697911.

It is an arithmetic number, because the mean of its divisors is an integer number (3697911).

Almost surely, 2^7395821 is an apocalyptic number.

It is an amenable number.

7395821 is a deficient number, since it is larger than the sum of its proper divisors (1).

7395821 is an equidigital number, since it uses as much as digits as its factorization.

7395821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

The square root of 7395821 is about 2719.5258777956. The cubic root of 7395821 is about 194.8328262603.

The spelling of 7395821 in words is "seven million, three hundred ninety-five thousand, eight hundred twenty-one".