7921061 has 2 divisors, whose sum is σ = 7921062. Its totient is φ = 7921060.

The previous prime is 7921057. The next prime is 7921087. The reversal of 7921061 is 1601297.

It is an a-pointer prime, because the next prime (7921087) can be obtained adding 7921061 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7756225 + 164836 = 2785^2 + 406^2 .

It is a cyclic number.

It is not a de Polignac number, because 7921061 - 2² = 7921057 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7921061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7921021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3960530 + 3960531.

It is an arithmetic number, because the mean of its divisors is an integer number (3960531).

Almost surely, 2^7921061 is an apocalyptic number.

It is an amenable number.

7921061 is a deficient number, since it is larger than the sum of its proper divisors (1).

7921061 is an equidigital number, since it uses as much as digits as its factorization.

7921061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 7921061 is about 2814.4379545479. The cubic root of 7921061 is about 199.3399993918.

The spelling of 7921061 in words is "seven million, nine hundred twenty-one thousand, sixty-one".