1312450340 has 24 divisors (see below), whose sum is σ = 2759114232. Its totient is φ = 524414720.

The previous prime is 1312450333. The next prime is 1312450351. The reversal of 1312450340 is 430542131.

It can be written as a sum of positive squares in 4 ways, for example, as 182952676 + 1129497664 = 13526^2 + 33608^2 .

It is a super-2 number, since 2×1312450340² = 3445051789932231200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16049 + ... + 53688.

It is an arithmetic number, because the mean of its divisors is an integer number (114963093).

Almost surely, 2^1312450340 is an apocalyptic number.

1312450340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312450340 is an abundant number, since it is smaller than the sum of its proper divisors (1446663892).

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

1312450340 is a wasteful number, since it uses less digits than its factorization.

1312450340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70687 (or 70685 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1312450340 is about 36227.7564858770. The cubic root of 1312450340 is about 1094.8659761044.

Adding to 1312450340 its reverse (430542131), we get a palindrome (1742992471).

The spelling of 1312450340 in words is "one billion, three hundred twelve million, four hundred fifty thousand, three hundred forty".