7921141 has 2 divisors, whose sum is σ = 7921142. Its totient is φ = 7921140.

The previous prime is 7921129. The next prime is 7921153. The reversal of 7921141 is 1411297.

It is a balanced prime because it is at equal distance from previous prime (7921129) and next prime (7921153).

It can be written as a sum of positive squares in only one way, i.e., 4498641 + 3422500 = 2121^2 + 1850^2 .

It is an emirp because it is prime and its reverse (1411297) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7921141 - 2⁷ = 7921013 is a prime.

7921141 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7921171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3960570 + 3960571.

It is an arithmetic number, because the mean of its divisors is an integer number (3960571).

Almost surely, 2^7921141 is an apocalyptic number.

It is an amenable number.

7921141 is a deficient number, since it is larger than the sum of its proper divisors (1).

7921141 is an equidigital number, since it uses as much as digits as its factorization.

7921141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 25.

The square root of 7921141 is about 2814.4521669412. The cubic root of 7921141 is about 199.3406704781.

The spelling of 7921141 in words is "seven million, nine hundred twenty-one thousand, one hundred forty-one".