1155457 has 2 divisors, whose sum is σ = 1155458. Its totient is φ = 1155456.

The previous prime is 1155449. The next prime is 1155461. The reversal of 1155457 is 7545511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1032256 + 123201 = 1016^2 + 351^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155457 - 2³ = 1155449 is a prime.

It is a Chen prime.

1155457 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1155437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577728 + 577729.

It is an arithmetic number, because the mean of its divisors is an integer number (577729).

2^1155457 is an apocalyptic number.

It is an amenable number.

1155457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155457 is an equidigital number, since it uses as much as digits as its factorization.

1155457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3500, while the sum is 28.

The square root of 1155457 is about 1074.9218576250. The cubic root of 1155457 is about 104.9344110410.

It can be divided in two parts, 11554 and 57, that added together give a palindrome (11611).

The spelling of 1155457 in words is "one million, one hundred fifty-five thousand, four hundred fifty-seven".