7761001 has 2 divisors, whose sum is σ = 7761002. Its totient is φ = 7761000.

The previous prime is 7760999. The next prime is 7761007. The reversal of 7761001 is 1001677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6656400 + 1104601 = 2580^2 + 1051^2 .

It is a cyclic number.

It is not a de Polignac number, because 7761001 - 2¹ = 7760999 is a prime.

Together with 7760999, it forms a pair of twin primes.

It is a Chen prime.

7761001 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (7761007) 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, 3880500 + 3880501.

It is an arithmetic number, because the mean of its divisors is an integer number (3880501).

Almost surely, 2^7761001 is an apocalyptic number.

It is an amenable number.

7761001 is a deficient number, since it is larger than the sum of its proper divisors (1).

7761001 is an equidigital number, since it uses as much as digits as its factorization.

7761001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 7761001 is about 2785.8573186723. The cubic root of 7761001 is about 197.9881722690.

Adding to 7761001 its reverse (1001677), we get a palindrome (8762678).

The spelling of 7761001 in words is "seven million, seven hundred sixty-one thousand, one".