1129890 has 16 divisors (see below), whose sum is σ = 2711808. Its totient is φ = 301296.

The previous prime is 1129889. The next prime is 1129897. The reversal of 1129890 is 989211.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 37663 = 1129890 / (1 + 1 + 2 + 9 + 8 + 9 + 0).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1129897) 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, 18802 + ... + 18861.

It is an arithmetic number, because the mean of its divisors is an integer number (169488).

2^1129890 is an apocalyptic number.

1129890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1129890 is an abundant number, since it is smaller than the sum of its proper divisors (1581918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1129890 is a wasteful number, since it uses less digits than its factorization.

1129890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37673.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1129890 is about 1062.9628403665. The cubic root of 1129890 is about 104.1546638615.

The spelling of 1129890 in words is "one million, one hundred twenty-nine thousand, eight hundred ninety".