7742561 has 2 divisors, whose sum is σ = 7742562. Its totient is φ = 7742560.

The previous prime is 7742549. The next prime is 7742569. The reversal of 7742561 is 1652477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7728400 + 14161 = 2780^2 + 119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7742561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7742569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3871280 + 3871281.

It is an arithmetic number, because the mean of its divisors is an integer number (3871281).

Almost surely, 2^7742561 is an apocalyptic number.

It is an amenable number.

7742561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7742561 is an equidigital number, since it uses as much as digits as its factorization.

7742561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 32.

The square root of 7742561 is about 2782.5457768022. The cubic root of 7742561 is about 197.8312424601.

The spelling of 7742561 in words is "seven million, seven hundred forty-two thousand, five hundred sixty-one".