1321455000 has 160 divisors (see below), whose sum is σ = 4241579760. Its totient is φ = 342720000.

The previous prime is 1321454993. The next prime is 1321455007. The reversal of 1321455000 is 5541231.

It is an interprime number because it is at equal distance from previous prime (1321454993) and next prime (1321455007).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321455007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 553810 + ... + 556190.

Almost surely, 2^1321455000 is an apocalyptic number.

1321455000 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 1321455000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2120789880).

1321455000 is an abundant number, since it is smaller than the sum of its proper divisors (2920124760).

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

1321455000 is a wasteful number, since it uses less digits than its factorization.

1321455000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2447 (or 2428 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1321455000 is about 36351.8225127709. The cubic root of 1321455000 is about 1097.3642126652.

Adding to 1321455000 its reverse (5541231), we get a palindrome (1326996231).

The spelling of 1321455000 in words is "one billion, three hundred twenty-one million, four hundred fifty-five thousand".