1312242520 has 32 divisors (see below), whose sum is σ = 2953584000. Its totient is φ = 524712448.

The previous prime is 1312242509. The next prime is 1312242539. The reversal of 1312242520 is 252422131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1312242491 and 1312242500.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 200256 + ... + 206704.

It is an arithmetic number, because the mean of its divisors is an integer number (92299500).

Almost surely, 2^1312242520 is an apocalyptic number.

1312242520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312242520 is an abundant number, since it is smaller than the sum of its proper divisors (1641341480).

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

1312242520 is a wasteful number, since it uses less digits than its factorization.

1312242520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11547 (or 11543 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1312242520 is about 36224.8881295719. Note that the first 3 decimals coincide. The cubic root of 1312242520 is about 1094.8081841888.

Adding to 1312242520 its reverse (252422131), we get a palindrome (1564664651).

The spelling of 1312242520 in words is "one billion, three hundred twelve million, two hundred forty-two thousand, five hundred twenty".