7921259 has 2 divisors, whose sum is σ = 7921260. Its totient is φ = 7921258.

The previous prime is 7921247. The next prime is 7921261. The reversal of 7921259 is 9521297.

It is a strong prime.

It is an emirp because it is prime and its reverse (9521297) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7921259 - 2⁸ = 7921003 is a prime.

Together with 7921261, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7921229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3960629 + 3960630.

It is an arithmetic number, because the mean of its divisors is an integer number (3960630).

Almost surely, 2^7921259 is an apocalyptic number.

7921259 is a deficient number, since it is larger than the sum of its proper divisors (1).

7921259 is an equidigital number, since it uses as much as digits as its factorization.

7921259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 35.

The square root of 7921259 is about 2814.4731300902. The cubic root of 7921259 is about 199.3416603221.

The spelling of 7921259 in words is "seven million, nine hundred twenty-one thousand, two hundred fifty-nine".