129149342 has 8 divisors (see below), whose sum is σ = 221398896. Its totient is φ = 55349712.

The previous prime is 129149341. The next prime is 129149399. The reversal of 129149342 is 243941921.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129149341) 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, 4612463 + ... + 4612490.

It is an arithmetic number, because the mean of its divisors is an integer number (27674862).

Almost surely, 2^129149342 is an apocalyptic number.

129149342 is a deficient number, since it is larger than the sum of its proper divisors (92249554).

129149342 is an equidigital number, since it uses as much as digits as its factorization.

129149342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9224962.

The product of its digits is 15552, while the sum is 35.

The square root of 129149342 is about 11364.3892048803. The cubic root of 129149342 is about 505.4723443900.

The spelling of 129149342 in words is "one hundred twenty-nine million, one hundred forty-nine thousand, three hundred forty-two".