7568921 has 2 divisors, whose sum is σ = 7568922. Its totient is φ = 7568920.

The previous prime is 7568917. The next prime is 7568947. The reversal of 7568921 is 1298657.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5784025 + 1784896 = 2405^2 + 1336^2 .

It is a cyclic number.

It is not a de Polignac number, because 7568921 - 2² = 7568917 is a prime.

It is not a weakly prime, because it can be changed into another prime (7568021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3784460 + 3784461.

It is an arithmetic number, because the mean of its divisors is an integer number (3784461).

Almost surely, 2^7568921 is an apocalyptic number.

It is an amenable number.

7568921 is a deficient number, since it is larger than the sum of its proper divisors (1).

7568921 is an equidigital number, since it uses as much as digits as its factorization.

7568921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 7568921 is about 2751.1672068415. The cubic root of 7568921 is about 196.3411471613.

The spelling of 7568921 in words is "seven million, five hundred sixty-eight thousand, nine hundred twenty-one".