129742351 has 8 divisors (see below), whose sum is σ = 139425840. Its totient is φ = 120286848.

The previous prime is 129742297. The next prime is 129742367. The reversal of 129742351 is 153247921.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 129742351 - 2¹⁵ = 129709583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129742381) 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, 55816 + ... + 58093.

It is an arithmetic number, because the mean of its divisors is an integer number (17428230).

Almost surely, 2^129742351 is an apocalyptic number.

129742351 is a deficient number, since it is larger than the sum of its proper divisors (9683489).

129742351 is a wasteful number, since it uses less digits than its factorization.

129742351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113993.

The product of its digits is 15120, while the sum is 34.

The square root of 129742351 is about 11390.4499911110. The cubic root of 129742351 is about 506.2448145382.

The spelling of 129742351 in words is "one hundred twenty-nine million, seven hundred forty-two thousand, three hundred fifty-one".