7260821 has 2 divisors, whose sum is σ = 7260822. Its totient is φ = 7260820.

The previous prime is 7260797. The next prime is 7260823. The reversal of 7260821 is 1280627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7214596 + 46225 = 2686^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 7260821 - 2¹⁴ = 7244437 is a prime.

Together with 7260823, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₄₉₃₁₇₂ and since 7260821 and 493172 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7260823) 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, 3630410 + 3630411.

It is an arithmetic number, because the mean of its divisors is an integer number (3630411).

Almost surely, 2^7260821 is an apocalyptic number.

It is an amenable number.

7260821 is a deficient number, since it is larger than the sum of its proper divisors (1).

7260821 is an equidigital number, since it uses as much as digits as its factorization.

7260821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 7260821 is about 2694.5910635939. The cubic root of 7260821 is about 193.6400755578.

The spelling of 7260821 in words is "seven million, two hundred sixty thousand, eight hundred twenty-one".