7656541 has 4 divisors (see below), whose sum is σ = 7724412. Its totient is φ = 7588672.

The previous prime is 7656533. The next prime is 7656577. The reversal of 7656541 is 1456567.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3572100 + 4084441 = 1890^2 + 2021^2 .

It is a cyclic number.

It is not a de Polignac number, because 7656541 - 2³ = 7656533 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7656497 and 7656506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7656041) 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 in 3 ways as a sum of consecutive naturals, for example, 33766 + ... + 33991.

It is an arithmetic number, because the mean of its divisors is an integer number (1931103).

Almost surely, 2^7656541 is an apocalyptic number.

It is an amenable number.

7656541 is a deficient number, since it is larger than the sum of its proper divisors (67871).

7656541 is a wasteful number, since it uses less digits than its factorization.

7656541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67870.

The product of its digits is 25200, while the sum is 34.

The square root of 7656541 is about 2767.0455363076. The cubic root of 7656541 is about 197.0958760984.

The spelling of 7656541 in words is "seven million, six hundred fifty-six thousand, five hundred forty-one".