1090217 has 2 divisors, whose sum is σ = 1090218. Its totient is φ = 1090216.

The previous prime is 1090213. The next prime is 1090241. The reversal of 1090217 is 7120901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 952576 + 137641 = 976^2 + 371^2 .

It is a cyclic number.

It is not a de Polignac number, because 1090217 - 2² = 1090213 is a prime.

It is not a weakly prime, because it can be changed into another prime (1090211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545108 + 545109.

It is an arithmetic number, because the mean of its divisors is an integer number (545109).

2^1090217 is an apocalyptic number.

It is an amenable number.

1090217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1090217 is an equidigital number, since it uses as much as digits as its factorization.

1090217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 1090217 is about 1044.1345698711. The cubic root of 1090217 is about 102.9210756815.

The spelling of 1090217 in words is "one million, ninety thousand, two hundred seventeen".