1240523204145 has 32 divisors (see below), whose sum is σ = 2212202378880. Its totient is φ = 589920629760.

The previous prime is 1240523204131. The next prime is 1240523204147. The reversal of 1240523204145 is 5414023250421.

It is not a de Polignac number, because 1240523204145 - 2⁵ = 1240523204113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240523204147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128016126 + ... + 128025815.

It is an arithmetic number, because the mean of its divisors is an integer number (69131324340).

Almost surely, 2^{1240523204145} is an apocalyptic number.

1240523204145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1240523204145 is a deficient number, since it is larger than the sum of its proper divisors (971679174735).

1240523204145 is a wasteful number, since it uses less digits than its factorization.

1240523204145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256041985.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 1240523204145 its reverse (5414023250421), we get a palindrome (6654546454566).

The spelling of 1240523204145 in words is "one trillion, two hundred forty billion, five hundred twenty-three million, two hundred four thousand, one hundred forty-five".