1311090 has 64 divisors (see below), whose sum is σ = 3576960. Its totient is φ = 304640.

The previous prime is 1311067. The next prime is 1311097. The reversal of 1311090 is 901131.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9502 + ... + 9638.

It is an arithmetic number, because the mean of its divisors is an integer number (55890).

2^1311090 is an apocalyptic number.

1311090 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 1311090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1788480).

1311090 is an abundant number, since it is smaller than the sum of its proper divisors (2265870).

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

1311090 is a wasteful number, since it uses less digits than its factorization.

1311090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187.

The product of its (nonzero) digits is 27, while the sum is 15.

The square root of 1311090 is about 1145.0283839277. The cubic root of 1311090 is about 109.4487573252.

It can be divided in two parts, 131 and 1090, that added together give a palindrome (1221).

The spelling of 1311090 in words is "one million, three hundred eleven thousand, ninety".