1545252143421 has 48 divisors (see below), whose sum is σ = 2425891490880. Its totient is φ = 872301104640.

The previous prime is 1545252143399. The next prime is 1545252143441. The reversal of 1545252143421 is 1243412525451.

It is not a de Polignac number, because 1545252143421 - 2⁵ = 1545252143389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1545252143421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1545252143441) 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 47 ways as a sum of consecutive naturals, for example, 5256666 + ... + 5542836.

It is an arithmetic number, because the mean of its divisors is an integer number (50539406060).

Almost surely, 2^{1545252143421} is an apocalyptic number.

It is an amenable number.

1545252143421 is a deficient number, since it is larger than the sum of its proper divisors (880639347459).

1545252143421 is a wasteful number, since it uses less digits than its factorization.

1545252143421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286634 (or 286627 counting only the distinct ones).

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

Adding to 1545252143421 its reverse (1243412525451), we get a palindrome (2788664668872).

The spelling of 1545252143421 in words is "one trillion, five hundred forty-five billion, two hundred fifty-two million, one hundred forty-three thousand, four hundred twenty-one".