7138771 has 2 divisors, whose sum is σ = 7138772. Its totient is φ = 7138770.

The previous prime is 7138753. The next prime is 7138777. The reversal of 7138771 is 1778317.

It is a strong prime.

It is an emirp because it is prime and its reverse (1778317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7138771 - 2⁷ = 7138643 is a prime.

It is equal to p₄₈₅₄₄₉ and since 7138771 and 485449 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (7138777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3569385 + 3569386.

It is an arithmetic number, because the mean of its divisors is an integer number (3569386).

Almost surely, 2^7138771 is an apocalyptic number.

7138771 is a deficient number, since it is larger than the sum of its proper divisors (1).

7138771 is an equidigital number, since it uses as much as digits as its factorization.

7138771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8232, while the sum is 34.

The square root of 7138771 is about 2671.8478624353. The cubic root of 7138771 is about 192.5489480294.

The spelling of 7138771 in words is "seven million, one hundred thirty-eight thousand, seven hundred seventy-one".