1155149 has 2 divisors, whose sum is σ = 1155150. Its totient is φ = 1155148.

The previous prime is 1155127. The next prime is 1155151. The reversal of 1155149 is 9415511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1060900 + 94249 = 1030^2 + 307^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155149 - 2⁸ = 1154893 is a prime.

Together with 1155151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577574 + 577575.

It is an arithmetic number, because the mean of its divisors is an integer number (577575).

2^1155149 is an apocalyptic number.

It is an amenable number.

1155149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155149 is an equidigital number, since it uses as much as digits as its factorization.

1155149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900, while the sum is 26.

The square root of 1155149 is about 1074.7785818484. The cubic root of 1155149 is about 104.9250863983.

The spelling of 1155149 in words is "one million, one hundred fifty-five thousand, one hundred forty-nine".