1252421804518 has 48 divisors (see below), whose sum is σ = 2026215458064. Its totient is φ = 580352256000.

The previous prime is 1252421804503. The next prime is 1252421804519. The reversal of 1252421804518 is 8154081242521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252421804519) 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 23 ways as a sum of consecutive naturals, for example, 139138018 + ... + 139147018.

It is an arithmetic number, because the mean of its divisors is an integer number (42212822043).

Almost surely, 2^{1252421804518} is an apocalyptic number.

1252421804518 is a deficient number, since it is larger than the sum of its proper divisors (773793653546).

1252421804518 is a wasteful number, since it uses less digits than its factorization.

1252421804518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12697 (or 12680 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 43.

The spelling of 1252421804518 in words is "one trillion, two hundred fifty-two billion, four hundred twenty-one million, eight hundred four thousand, five hundred eighteen".