1252453401440 has 96 divisors (see below), whose sum is σ = 2966439490560. Its totient is φ = 499709965824.

The previous prime is 1252453401389. The next prime is 1252453401443. The reversal of 1252453401440 is 441043542521.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1252453401440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252453401443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122268959 + ... + 122279201.

It is an arithmetic number, because the mean of its divisors is an integer number (30900411360).

Almost surely, 2^{1252453401440} is an apocalyptic number.

1252453401440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252453401440 is an abundant number, since it is smaller than the sum of its proper divisors (1713986089120).

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

1252453401440 is a wasteful number, since it uses less digits than its factorization.

1252453401440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12124 (or 12116 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 1252453401440 its reverse (441043542521), we get a palindrome (1693496943961).

The spelling of 1252453401440 in words is "one trillion, two hundred fifty-two billion, four hundred fifty-three million, four hundred one thousand, four hundred forty".