1109257 has 2 divisors, whose sum is σ = 1109258. Its totient is φ = 1109256.

The previous prime is 1109249. The next prime is 1109281. The reversal of 1109257 is 7529011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1089936 + 19321 = 1044^2 + 139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1109257 - 2³ = 1109249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1109287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554628 + 554629.

It is an arithmetic number, because the mean of its divisors is an integer number (554629).

2^1109257 is an apocalyptic number.

It is an amenable number.

1109257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109257 is an equidigital number, since it uses as much as digits as its factorization.

1109257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 1109257 is about 1053.2127040631. The cubic root of 1109257 is about 103.5167732468.

The spelling of 1109257 in words is "one million, one hundred nine thousand, two hundred fifty-seven".