1311040 has 56 divisors (see below), whose sum is σ = 3319272. Its totient is φ = 491520.

The previous prime is 1311031. The next prime is 1311043. The reversal of 1311040 is 401131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 419904 + 891136 = 648^2 + 944^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an Ulam number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311043) 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, 5320 + ... + 5560.

2^1311040 is an apocalyptic number.

1311040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1659636).

1311040 is an abundant number, since it is smaller than the sum of its proper divisors (2008232).

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

1311040 is a wasteful number, since it uses less digits than its factorization.

1311040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1311040 is about 1145.0065501996. The cubic root of 1311040 is about 109.4473659873.

Adding to 1311040 its reverse (401131), we get a palindrome (1712171).

Subtracting from 1311040 its reverse (401131), we obtain a palindrome (909909).

The spelling of 1311040 in words is "one million, three hundred eleven thousand, forty".