1129990 has 32 divisors (see below), whose sum is σ = 2255040. Its totient is φ = 406912.

The previous prime is 1129963. The next prime is 1129991. The reversal of 1129990 is 999211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49119 + ... + 49141.

It is an arithmetic number, because the mean of its divisors is an integer number (70470).

2^1129990 is an apocalyptic number.

1129990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1129990 is a deficient number, since it is larger than the sum of its proper divisors (1125050).

1129990 is an equidigital number, since it uses as much as digits as its factorization.

1129990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 1129990 is about 1063.0098776587. The cubic root of 1129990 is about 104.1577364789.

The spelling of 1129990 in words is "one million, one hundred twenty-nine thousand, nine hundred ninety".