1312542040 has 32 divisors (see below), whose sum is σ = 3108654000. Its totient is φ = 497384064.

The previous prime is 1312542031. The next prime is 1312542047. The reversal of 1312542040 is 402452131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312542047) by changing a digit.

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, 862755 + ... + 864274.

Almost surely, 2^1312542040 is an apocalyptic number.

1312542040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312542040 is an abundant number, since it is smaller than the sum of its proper divisors (1796111960).

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

1312542040 is a wasteful number, since it uses less digits than its factorization.

1312542040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727059 (or 1727055 counting only the distinct ones).

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

The square root of 1312542040 is about 36229.0220679499. The cubic root of 1312542040 is about 1094.8914746875.

Adding to 1312542040 its reverse (402452131), we get a palindrome (1714994171).

The spelling of 1312542040 in words is "one billion, three hundred twelve million, five hundred forty-two thousand, forty".