1229090 has 16 divisors (see below), whose sum is σ = 2238840. Its totient is φ = 485760.

The previous prime is 1229077. The next prime is 1229093. The reversal of 1229090 is 909221.

It can be written as a sum of positive squares in 4 ways, for example, as 776161 + 452929 = 881^2 + 673^2 .

It is not an unprimeable number, because it can be changed into a prime (1229093) 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, 200 + ... + 1580.

2^1229090 is an apocalyptic number.

1229090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1229090 is a deficient number, since it is larger than the sum of its proper divisors (1009750).

1229090 is a wasteful number, since it uses less digits than its factorization.

1229090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1229090 is about 1108.6433150477. The cubic root of 1229090 is about 107.1176973728.

The spelling of 1229090 in words is "one million, two hundred twenty-nine thousand, ninety".