1321403000 has 64 divisors (see below), whose sum is σ = 3105479520. Its totient is φ = 526272000.

The previous prime is 1321402933. The next prime is 1321403023. The reversal of 1321403000 is 3041231.

It is a super-2 number, since 2×1321403000² = 3492211776818000000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238259 + ... + 243741.

Almost surely, 2^1321403000 is an apocalyptic number.

1321403000 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 1321403000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1552739760).

1321403000 is an abundant number, since it is smaller than the sum of its proper divisors (1784076520).

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

1321403000 is a wasteful number, since it uses less digits than its factorization.

1321403000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5745 (or 5731 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1321403000 is about 36351.1072733693. The cubic root of 1321403000 is about 1097.3498185094.

Adding to 1321403000 its reverse (3041231), we get a palindrome (1324444231).

The spelling of 1321403000 in words is "one billion, three hundred twenty-one million, four hundred three thousand".