1321465200 has 360 divisors, whose sum is σ = 4908019200. Its totient is φ = 302860800.

The previous prime is 1321465183. The next prime is 1321465217. The reversal of 1321465200 is 25641231.

It is an interprime number because it is at equal distance from previous prime (1321465183) and next prime (1321465217).

It is a super-2 number, since 2×1321465200² = 3492540549622080000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2758561 + ... + 2759039.

Almost surely, 2^1321465200 is an apocalyptic number.

1321465200 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 1321465200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2454009600).

1321465200 is an abundant number, since it is smaller than the sum of its proper divisors (3586554000).

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

1321465200 is a wasteful number, since it uses less digits than its factorization.

1321465200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1321465200 is about 36351.9628080796. The cubic root of 1321465200 is about 1097.3670360899.

The spelling of 1321465200 in words is "one billion, three hundred twenty-one million, four hundred sixty-five thousand, two hundred".