1252454423439 has 4 divisors (see below), whose sum is σ = 1669939231256. Its totient is φ = 834969615624.

The previous prime is 1252454423413. The next prime is 1252454423453. The reversal of 1252454423439 is 9343244542521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1252454423439 - 2⁹ = 1252454422927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252454423939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208742403904 + ... + 208742403909.

It is an arithmetic number, because the mean of its divisors is an integer number (417484807814).

Almost surely, 2^{1252454423439} is an apocalyptic number.

1252454423439 is a deficient number, since it is larger than the sum of its proper divisors (417484807817).

1252454423439 is an equidigital number, since it uses as much as digits as its factorization.

1252454423439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417484807816.

The product of its digits is 4147200, while the sum is 48.

The spelling of 1252454423439 in words is "one trillion, two hundred fifty-two billion, four hundred fifty-four million, four hundred twenty-three thousand, four hundred thirty-nine".