1231425143 has 4 divisors (see below), whose sum is σ = 1326150168. Its totient is φ = 1136700120.

The previous prime is 1231425127. The next prime is 1231425163. The reversal of 1231425143 is 3415241321.

It is a happy number.

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 1231425143 - 2⁴ = 1231425127 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 (1231425103) 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, 47362493 + ... + 47362518.

It is an arithmetic number, because the mean of its divisors is an integer number (331537542).

Almost surely, 2^1231425143 is an apocalyptic number.

1231425143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1231425143 is a deficient number, since it is larger than the sum of its proper divisors (94725025).

1231425143 is an equidigital number, since it uses as much as digits as its factorization.

1231425143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94725024.

The product of its digits is 2880, while the sum is 26.

The square root of 1231425143 is about 35091.6677147154. The cubic root of 1231425143 is about 1071.8549194650.

Adding to 1231425143 its reverse (3415241321), we get a palindrome (4646666464).

The spelling of 1231425143 in words is "one billion, two hundred thirty-one million, four hundred twenty-five thousand, one hundred forty-three".