1143090 has 48 divisors (see below), whose sum is σ = 3203928. Its totient is φ = 281088.

The previous prime is 1143089. The next prime is 1143091. The reversal of 1143090 is 903411.

It is an interprime number because it is at equal distance from previous prime (1143089) and next prime (1143091).

It can be written as a sum of positive squares in 4 ways, for example, as 974169 + 168921 = 987^2 + 411^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 682 + ... + 1658.

2^1143090 is an apocalyptic number.

1143090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1601964).

1143090 is an abundant number, since it is smaller than the sum of its proper divisors (2060838).

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

1143090 is a wasteful number, since it uses less digits than its factorization.

1143090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1143090 is about 1069.1538710588. The cubic root of 1143090 is about 104.5586920283.

The spelling of 1143090 in words is "one million, one hundred forty-three thousand, ninety".