7985501 has 2 divisors, whose sum is σ = 7985502. Its totient is φ = 7985500.

The previous prime is 7985489. The next prime is 7985503. The reversal of 7985501 is 1055897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7896100 + 89401 = 2810^2 + 299^2 .

It is an emirp because it is prime and its reverse (1055897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7985501 - 2⁶ = 7985437 is a prime.

It is a Sophie Germain prime.

Together with 7985503, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7985503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3992750 + 3992751.

It is an arithmetic number, because the mean of its divisors is an integer number (3992751).

Almost surely, 2^7985501 is an apocalyptic number.

It is an amenable number.

7985501 is a deficient number, since it is larger than the sum of its proper divisors (1).

7985501 is an equidigital number, since it uses as much as digits as its factorization.

7985501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 35.

The square root of 7985501 is about 2825.8628770696. The cubic root of 7985501 is about 199.8791019330.

The spelling of 7985501 in words is "seven million, nine hundred eighty-five thousand, five hundred one".