1312242200 has 48 divisors (see below), whose sum is σ = 3059770680. Its totient is φ = 523381760.

The previous prime is 1312242157. The next prime is 1312242251. The reversal of 1312242200 is 22422131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61307 + ... + 79893.

Almost surely, 2^1312242200 is an apocalyptic number.

1312242200 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 1312242200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1529885340).

1312242200 is an abundant number, since it is smaller than the sum of its proper divisors (1747528480).

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

1312242200 is a wasteful number, since it uses less digits than its factorization.

1312242200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18956 (or 18947 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1312242200 is about 36224.8837127188. The cubic root of 1312242200 is about 1094.8080951965.

Adding to 1312242200 its reverse (22422131), we get a palindrome (1334664331).

The spelling of 1312242200 in words is "one billion, three hundred twelve million, two hundred forty-two thousand, two hundred".