129618142 has 8 divisors (see below), whose sum is σ = 194769432. Its totient is φ = 64695000.

The previous prime is 129618121. The next prime is 129618169. The reversal of 129618142 is 241816921.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 129618098 and 129618107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55609 + ... + 57892.

It is an arithmetic number, because the mean of its divisors is an integer number (24346179).

Almost surely, 2^129618142 is an apocalyptic number.

129618142 is a deficient number, since it is larger than the sum of its proper divisors (65151290).

129618142 is a wasteful number, since it uses less digits than its factorization.

129618142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114074.

The product of its digits is 6912, while the sum is 34.

The square root of 129618142 is about 11384.9963548523. The cubic root of 129618142 is about 506.0832115907.

The spelling of 129618142 in words is "one hundred twenty-nine million, six hundred eighteen thousand, one hundred forty-two".