1312501542 has 16 divisors (see below), whose sum is σ = 2863639872. Its totient is φ = 397727720.

The previous prime is 1312501451. The next prime is 1312501543. The reversal of 1312501542 is 2451052131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312501543) 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, 9943128 + ... + 9943259.

It is an arithmetic number, because the mean of its divisors is an integer number (178977492).

Almost surely, 2^1312501542 is an apocalyptic number.

1312501542 is an abundant number, since it is smaller than the sum of its proper divisors (1551138330).

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

1312501542 is a wasteful number, since it uses less digits than its factorization.

1312501542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19886403.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1312501542 is about 36228.4631470892. The cubic root of 1312501542 is about 1094.8802137476.

Adding to 1312501542 its reverse (2451052131), we get a palindrome (3763553673).

The spelling of 1312501542 in words is "one billion, three hundred twelve million, five hundred one thousand, five hundred forty-two".