1138771 has 2 divisors, whose sum is σ = 1138772. Its totient is φ = 1138770.

The previous prime is 1138757. The next prime is 1138777. The reversal of 1138771 is 1778311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1138771 - 2¹³ = 1130579 is a prime.

1138771 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1138777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569385 + 569386.

It is an arithmetic number, because the mean of its divisors is an integer number (569386).

2^1138771 is an apocalyptic number.

1138771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138771 is an equidigital number, since it uses as much as digits as its factorization.

1138771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1176, while the sum is 28.

The square root of 1138771 is about 1067.1321380223. The cubic root of 1138771 is about 104.4268392019.

The spelling of 1138771 in words is "one million, one hundred thirty-eight thousand, seven hundred seventy-one".