7948561 has 2 divisors, whose sum is σ = 7948562. Its totient is φ = 7948560.

The previous prime is 7948553. The next prime is 7948583. The reversal of 7948561 is 1658497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7924225 + 24336 = 2815^2 + 156^2 .

It is an emirp because it is prime and its reverse (1658497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7948561 - 2³ = 7948553 is a prime.

It is not a weakly prime, because it can be changed into another prime (7948511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3974280 + 3974281.

It is an arithmetic number, because the mean of its divisors is an integer number (3974281).

Almost surely, 2^7948561 is an apocalyptic number.

It is an amenable number.

7948561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7948561 is an equidigital number, since it uses as much as digits as its factorization.

7948561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 7948561 is about 2819.3192440729. The cubic root of 7948561 is about 199.5704196308.

Subtracting from 7948561 its reverse (1658497), we obtain a square (6290064 = 2508²).

The spelling of 7948561 in words is "seven million, nine hundred forty-eight thousand, five hundred sixty-one".