1217090 has 16 divisors (see below), whose sum is σ = 2503872. Its totient is φ = 417264.

The previous prime is 1217089. The next prime is 1217093. The reversal of 1217090 is 907121.

It is not an unprimeable number, because it can be changed into a prime (1217093) 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 in 7 ways as a sum of consecutive naturals, for example, 8624 + ... + 8763.

It is an arithmetic number, because the mean of its divisors is an integer number (156492).

2^1217090 is an apocalyptic number.

1217090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1217090 is an abundant number, since it is smaller than the sum of its proper divisors (1286782).

1217090 is a wasteful number, since it uses less digits than its factorization.

1217090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17401.

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

The square root of 1217090 is about 1103.2180201574. The cubic root of 1217090 is about 106.7679485056.

The spelling of 1217090 in words is "one million, two hundred seventeen thousand, ninety".