1521242056452 has 24 divisors (see below), whose sum is σ = 3549988760416. Its totient is φ = 507020119488.

The previous prime is 1521242056403. The next prime is 1521242056463. The reversal of 1521242056452 is 2546502421251.

It is a self number, because there is not a number n which added to its sum of digits gives 1521242056452.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7466038 + ... + 7667085.

Almost surely, 2^{1521242056452} is an apocalyptic number.

1521242056452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1521242056452 is an abundant number, since it is smaller than the sum of its proper divisors (2028746703964).

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

1521242056452 is a wasteful number, since it uses less digits than its factorization.

1521242056452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15141507 (or 15141505 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 39.

The spelling of 1521242056452 in words is "one trillion, five hundred twenty-one billion, two hundred forty-two million, fifty-six thousand, four hundred fifty-two".