7292821 has 2 divisors, whose sum is σ = 7292822. Its totient is φ = 7292820.

The previous prime is 7292819. The next prime is 7292837. The reversal of 7292821 is 1282927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6502500 + 790321 = 2550^2 + 889^2 .

It is a cyclic number.

It is not a de Polignac number, because 7292821 - 2¹ = 7292819 is a prime.

Together with 7292819, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7292851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3646410 + 3646411.

It is an arithmetic number, because the mean of its divisors is an integer number (3646411).

Almost surely, 2^7292821 is an apocalyptic number.

It is an amenable number.

7292821 is a deficient number, since it is larger than the sum of its proper divisors (1).

7292821 is an equidigital number, since it uses as much as digits as its factorization.

7292821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 7292821 is about 2700.5223568784. The cubic root of 7292821 is about 193.9241298250.

The spelling of 7292821 in words is "seven million, two hundred ninety-two thousand, eight hundred twenty-one".