1321400 has 24 divisors (see below), whose sum is σ = 3072720. Its totient is φ = 528480.

The previous prime is 1321399. The next prime is 1321409. The reversal of 1321400 is 41231.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3104 + ... + 3503.

It is an arithmetic number, because the mean of its divisors is an integer number (128030).

2^1321400 is an apocalyptic number.

1321400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321400 is an abundant number, since it is smaller than the sum of its proper divisors (1751320).

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

1321400 is a wasteful number, since it uses less digits than its factorization.

1321400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6623 (or 6614 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1321400 is about 1149.5216396397. The cubic root of 1321400 is about 109.7348988066.

Adding to 1321400 its reverse (41231), we get a palindrome (1362631).

The spelling of 1321400 in words is "one million, three hundred twenty-one thousand, four hundred".