1521421013450 has 96 divisors (see below), whose sum is σ = 3131550567936. Its totient is φ = 546282696960.

The previous prime is 1521421013309. The next prime is 1521421013533. The reversal of 1521421013450 is 543101241251.

It is a happy number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 48156359 + ... + 48187941.

It is an arithmetic number, because the mean of its divisors is an integer number (32620318416).

Almost surely, 2^{1521421013450} is an apocalyptic number.

1521421013450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1521421013450 is an abundant number, since it is smaller than the sum of its proper divisors (1610129554486).

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

1521421013450 is a wasteful number, since it uses less digits than its factorization.

1521421013450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33648 (or 33643 counting only the distinct ones).

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

The spelling of 1521421013450 in words is "one trillion, five hundred twenty-one billion, four hundred twenty-one million, thirteen thousand, four hundred fifty".