1321600 has 96 divisors (see below), whose sum is σ = 3794400. Its totient is φ = 445440.

The previous prime is 1321589. The next prime is 1321601. The reversal of 1321600 is 61231.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (1321601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22371 + ... + 22429.

It is an arithmetic number, because the mean of its divisors is an integer number (39525).

2^1321600 is an apocalyptic number.

1321600 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 1321600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1897200).

1321600 is an abundant number, since it is smaller than the sum of its proper divisors (2472800).

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

1321600 is an equidigital number, since it uses as much as digits as its factorization.

1321600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1321600 is about 1149.6086290560. The cubic root of 1321600 is about 109.7404348221.

Adding to 1321600 its reverse (61231), we get a palindrome (1382831).

The spelling of 1321600 in words is "one million, three hundred twenty-one thousand, six hundred".