1252534433421 has 8 divisors (see below), whose sum is σ = 1684825079040. Its totient is φ = 827633371712.

The previous prime is 1252534433369. The next prime is 1252534433429. The reversal of 1252534433421 is 1243344352521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1252534433421 - 2⁹ = 1252534432909 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1252534433421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252534433429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1847395581 + ... + 1847396258.

It is an arithmetic number, because the mean of its divisors is an integer number (210603134880).

Almost surely, 2^{1252534433421} is an apocalyptic number.

It is an amenable number.

1252534433421 is a deficient number, since it is larger than the sum of its proper divisors (432290645619).

1252534433421 is a wasteful number, since it uses less digits than its factorization.

1252534433421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694791955.

The product of its digits is 345600, while the sum is 39.

Adding to 1252534433421 its reverse (1243344352521), we get a palindrome (2495878785942).

The spelling of 1252534433421 in words is "one trillion, two hundred fifty-two billion, five hundred thirty-four million, four hundred thirty-three thousand, four hundred twenty-one".