1140090 has 64 divisors (see below), whose sum is σ = 3214080. Its totient is φ = 253440.

The previous prime is 1139993. The next prime is 1140091. The reversal of 1140090 is 900411.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1140091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12766 + ... + 12854.

It is an arithmetic number, because the mean of its divisors is an integer number (50220).

2^1140090 is an apocalyptic number.

1140090 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 1140090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1607040).

1140090 is an abundant number, since it is smaller than the sum of its proper divisors (2073990).

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

1140090 is a wasteful number, since it uses less digits than its factorization.

1140090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1140090 is about 1067.7499707328. The cubic root of 1140090 is about 104.4671416729.

The spelling of 1140090 in words is "one million, one hundred forty thousand, ninety".