1320456 has 32 divisors (see below), whose sum is σ = 3392640. Its totient is φ = 427968.

The previous prime is 1320437. The next prime is 1320533. The reversal of 1320456 is 6540231.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145 + ... + 1631.

It is an arithmetic number, because the mean of its divisors is an integer number (106020).

2^1320456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1696320).

1320456 is an abundant number, since it is smaller than the sum of its proper divisors (2072184).

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

1320456 is a wasteful number, since it uses less digits than its factorization.

1320456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533 (or 1529 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1320456 is about 1149.1109606996. The cubic root of 1320456 is about 109.7087612701.

Adding to 1320456 its reverse (6540231), we get a palindrome (7860687).

The spelling of 1320456 in words is "one million, three hundred twenty thousand, four hundred fifty-six".