1242512520164 has 24 divisors (see below), whose sum is σ = 2256050891640. Its totient is φ = 598053689856.

The previous prime is 1242512520103. The next prime is 1242512520169. The reversal of 1242512520164 is 4610252152421.

It can be written as a sum of positive squares in 4 ways, for example, as 216327312100 + 1026185208064 = 465110^2 + 1013008^2 .

It is not an unprimeable number, because it can be changed into a prime (1242512520169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15853067 + ... + 15931250.

It is an arithmetic number, because the mean of its divisors is an integer number (94002120485).

Almost surely, 2^{1242512520164} is an apocalyptic number.

It is an amenable number.

1242512520164 is a deficient number, since it is larger than the sum of its proper divisors (1013538371476).

1242512520164 is a wasteful number, since it uses less digits than its factorization.

1242512520164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31784687 (or 31784685 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 1242512520164 its reverse (4610252152421), we get a palindrome (5852764672585).

The spelling of 1242512520164 in words is "one trillion, two hundred forty-two billion, five hundred twelve million, five hundred twenty thousand, one hundred sixty-four".