1234157143 has 4 divisors (see below), whose sum is σ = 1306754640. Its totient is φ = 1161559648.

The previous prime is 1234157137. The next prime is 1234157149. The reversal of 1234157143 is 3417514321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3417514321 = 13 ⋅262885717.

It is an interprime number because it is at equal distance from previous prime (1234157137) and next prime (1234157149).

It is a cyclic number.

It is not a de Polignac number, because 1234157143 - 2²⁹ = 697286231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234157149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36298723 + ... + 36298756.

It is an arithmetic number, because the mean of its divisors is an integer number (326688660).

Almost surely, 2^1234157143 is an apocalyptic number.

1234157143 is a deficient number, since it is larger than the sum of its proper divisors (72597497).

1234157143 is an equidigital number, since it uses as much as digits as its factorization.

1234157143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72597496.

The product of its digits is 10080, while the sum is 31.

The square root of 1234157143 is about 35130.5727678898. The cubic root of 1234157143 is about 1072.6469948833.

The spelling of 1234157143 in words is "one billion, two hundred thirty-four million, one hundred fifty-seven thousand, one hundred forty-three".