1302312540 has 48 divisors (see below), whose sum is σ = 3860976672. Its totient is φ = 326854656.

The previous prime is 1302312503. The next prime is 1302312581. The reversal of 1302312540 is 452132031.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 637369 + ... + 639408.

It is an arithmetic number, because the mean of its divisors is an integer number (80437014).

Almost surely, 2^1302312540 is an apocalyptic number.

1302312540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1302312540 is an abundant number, since it is smaller than the sum of its proper divisors (2558664132).

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

1302312540 is a wasteful number, since it uses less digits than its factorization.

1302312540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276806 (or 1276804 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1302312540 is about 36087.5676653332. The cubic root of 1302312540 is about 1092.0396509103.

Adding to 1302312540 its reverse (452132031), we get a palindrome (1754444571).

The spelling of 1302312540 in words is "one billion, three hundred two million, three hundred twelve thousand, five hundred forty".