1157111 has 2 divisors, whose sum is σ = 1157112. Its totient is φ = 1157110.

The previous prime is 1157099. The next prime is 1157131. The reversal of 1157111 is 1117511.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1157111 - 2¹⁰ = 1156087 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1157111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1157131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578555 + 578556.

It is an arithmetic number, because the mean of its divisors is an integer number (578556).

2^1157111 is an apocalyptic number.

1157111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157111 is an equidigital number, since it uses as much as digits as its factorization.

1157111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35, while the sum is 17.

The square root of 1157111 is about 1075.6909407446. The cubic root of 1157111 is about 104.9844572610.

The spelling of 1157111 in words is "one million, one hundred fifty-seven thousand, one hundred eleven".