1111151 has 2 divisors, whose sum is σ = 1111152. Its totient is φ = 1111150.

The previous prime is 1111091. The next prime is 1111157. The reversal of 1111151 is 1511111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1111151 - 2⁶ = 1111087 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555575 + 555576.

It is an arithmetic number, because the mean of its divisors is an integer number (555576).

2^1111151 is an apocalyptic number.

1111151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111151 is an equidigital number, since it uses as much as digits as its factorization.

1111151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5, while the sum is 11.

The square root of 1111151 is about 1054.1114741810. Note that the first 3 decimals coincide. The cubic root of 1111151 is about 103.5756562908.

Adding to 1111151 its reverse (1511111), we get a palindrome (2622262).

It can be divided in two parts, 1111 and 151, that multiplied together give a palindrome (167761).

The spelling of 1111151 in words is "one million, one hundred eleven thousand, one hundred fifty-one".