1252142143 has 4 divisors (see below), whose sum is σ = 1431019600. Its totient is φ = 1073264688.

The previous prime is 1252142113. The next prime is 1252142189. The reversal of 1252142143 is 3412412521.

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

It is a cyclic number.

It is not a de Polignac number, because 1252142143 - 2¹³ = 1252133951 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 (1252142113) 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, 89438718 + ... + 89438731.

It is an arithmetic number, because the mean of its divisors is an integer number (357754900).

Almost surely, 2^1252142143 is an apocalyptic number.

1252142143 is a deficient number, since it is larger than the sum of its proper divisors (178877457).

1252142143 is an equidigital number, since it uses as much as digits as its factorization.

1252142143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178877456.

The product of its digits is 1920, while the sum is 25.

The square root of 1252142143 is about 35385.6205682478. The cubic root of 1252142143 is about 1077.8323414656.

Adding to 1252142143 its reverse (3412412521), we get a palindrome (4664554664).

The spelling of 1252142143 in words is "one billion, two hundred fifty-two million, one hundred forty-two thousand, one hundred forty-three".