1312451300 has 72 divisors (see below), whose sum is σ = 3000182976. Its totient is φ = 497368960.

The previous prime is 1312451299. The next prime is 1312451321. The reversal of 1312451300 is 31542131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 243434 + ... + 248766.

It is an arithmetic number, because the mean of its divisors is an integer number (41669208).

Almost surely, 2^1312451300 is an apocalyptic number.

1312451300 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 1312451300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1500091488).

1312451300 is an abundant number, since it is smaller than the sum of its proper divisors (1687731676).

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

1312451300 is a wasteful number, since it uses less digits than its factorization.

1312451300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5477 (or 5470 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1312451300 is about 36227.7697353839. The cubic root of 1312451300 is about 1094.8662430532.

Adding to 1312451300 its reverse (31542131), we get a palindrome (1343993431).

The spelling of 1312451300 in words is "one billion, three hundred twelve million, four hundred fifty-one thousand, three hundred".