1521503450042 has 16 divisors (see below), whose sum is σ = 2351331909000. Its totient is φ = 737855869248.

The previous prime is 1521503449987. The next prime is 1521503450111. The reversal of 1521503450042 is 2400543051251.

It can be written as a sum of positive squares in 4 ways, for example, as 795055772281 + 726447677761 = 891659^2 + 852319^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1521503449990 and 1521503450008.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32406917 + ... + 32453832.

Almost surely, 2^{1521503450042} is an apocalyptic number.

1521503450042 is a deficient number, since it is larger than the sum of its proper divisors (829828458958).

1521503450042 is a wasteful number, since it uses less digits than its factorization.

1521503450042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64861105.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 1521503450042 in words is "one trillion, five hundred twenty-one billion, five hundred three million, four hundred fifty thousand, forty-two".