1155090 has 32 divisors (see below), whose sum is σ = 2802240. Its totient is φ = 304704.

The previous prime is 1155071. The next prime is 1155097. The reversal of 1155090 is 905511.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155097) 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, 4032 + ... + 4308.

It is an arithmetic number, because the mean of its divisors is an integer number (87570).

2^1155090 is an apocalyptic number.

1155090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1155090 is an abundant number, since it is smaller than the sum of its proper divisors (1647150).

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

1155090 is a wasteful number, since it uses less digits than its factorization.

1155090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426.

The product of its (nonzero) digits is 225, while the sum is 21.

The square root of 1155090 is about 1074.7511339840. The cubic root of 1155090 is about 104.9232999952.

The spelling of 1155090 in words is "one million, one hundred fifty-five thousand, ninety".