1321140 has 48 divisors (see below), whose sum is σ = 3753792. Its totient is φ = 347136.

The previous prime is 1321139. The next prime is 1321141. The reversal of 1321140 is 411231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1321139) and next prime (1321141).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321141) 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, 5707 + ... + 5933.

It is an arithmetic number, because the mean of its divisors is an integer number (78204).

2^1321140 is an apocalyptic number.

1321140 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 1321140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1876896).

1321140 is an abundant number, since it is smaller than the sum of its proper divisors (2432652).

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

1321140 is a wasteful number, since it uses less digits than its factorization.

1321140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1321140 is about 1149.4085435562. The cubic root of 1321140 is about 109.7277011513.

Adding to 1321140 its reverse (411231), we get a palindrome (1732371).

Subtracting from 1321140 its reverse (411231), we obtain a palindrome (909909).

The spelling of 1321140 in words is "one million, three hundred twenty-one thousand, one hundred forty".