1312541521004 has 48 divisors (see below), whose sum is σ = 2651482982400. Its totient is φ = 556862385600.

The previous prime is 1312541521003. The next prime is 1312541521063. The reversal of 1312541521004 is 4001251452131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1312541521003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20349197 + ... + 20413595.

It is an arithmetic number, because the mean of its divisors is an integer number (55239228800).

Almost surely, 2^{1312541521004} is an apocalyptic number.

1312541521004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1312541521004 is an abundant number, since it is smaller than the sum of its proper divisors (1338941461396).

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

1312541521004 is a wasteful number, since it uses less digits than its factorization.

1312541521004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71718 (or 71716 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 1312541521004 its reverse (4001251452131), we get a palindrome (5313792973135).

The spelling of 1312541521004 in words is "one trillion, three hundred twelve billion, five hundred forty-one million, five hundred twenty-one thousand, four".