129157143 has 8 divisors (see below), whose sum is σ = 182339568. Its totient is φ = 81039744.

The previous prime is 129157139. The next prime is 129157153. The reversal of 129157143 is 341751921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129157143 - 2² = 129157139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129157103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1266196 + ... + 1266297.

It is an arithmetic number, because the mean of its divisors is an integer number (22792446).

Almost surely, 2^129157143 is an apocalyptic number.

129157143 is a deficient number, since it is larger than the sum of its proper divisors (53182425).

129157143 is a wasteful number, since it uses less digits than its factorization.

129157143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532513.

The product of its digits is 7560, while the sum is 33.

The square root of 129157143 is about 11364.7324209591. The cubic root of 129157143 is about 505.4825215237.

The spelling of 129157143 in words is "one hundred twenty-nine million, one hundred fifty-seven thousand, one hundred forty-three".