1312502730 has 288 divisors, whose sum is σ = 4139589888. Its totient is φ = 265224960.

The previous prime is 1312502713. The next prime is 1312502749. The reversal of 1312502730 is 372052131.

It is a self number, because there is not a number n which added to its sum of digits gives 1312502730.

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 143 ways as a sum of consecutive naturals, for example, 8359812 + ... + 8359968.

It is an arithmetic number, because the mean of its divisors is an integer number (14373576).

Almost surely, 2^1312502730 is an apocalyptic number.

1312502730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312502730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2069794944).

1312502730 is an abundant number, since it is smaller than the sum of its proper divisors (2827087158).

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

1312502730 is a wasteful number, since it uses less digits than its factorization.

1312502730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 1312502730 is about 36228.4795430335. The cubic root of 1312502730 is about 1094.8805440881.

Adding to 1312502730 its reverse (372052131), we get a palindrome (1684554861).

The spelling of 1312502730 in words is "one billion, three hundred twelve million, five hundred two thousand, seven hundred thirty".