1199890 has 16 divisors (see below), whose sum is σ = 2183832. Its totient is φ = 474624.

The previous prime is 1199879. The next prime is 1199893. The reversal of 1199890 is 989911.

It can be written as a sum of positive squares in 4 ways, for example, as 1054729 + 145161 = 1027^2 + 381^2 .

It is not an unprimeable number, because it can be changed into a prime (1199893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352 + ... + 1588.

2^1199890 is an apocalyptic number.

1199890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1199890 is a deficient number, since it is larger than the sum of its proper divisors (983942).

1199890 is a wasteful number, since it uses less digits than its factorization.

1199890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 1199890 is about 1095.3949059586. The cubic root of 1199890 is about 106.2626098067.

The spelling of 1199890 in words is "one million, one hundred ninety-nine thousand, eight hundred ninety".