129210146 has 32 divisors (see below), whose sum is σ = 222781440. Its totient is φ = 55707264.

The previous prime is 129210121. The next prime is 129210161. The reversal of 129210146 is 641012921.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34271 + ... + 37853.

It is an arithmetic number, because the mean of its divisors is an integer number (6961920).

Almost surely, 2^129210146 is an apocalyptic number.

129210146 is a deficient number, since it is larger than the sum of its proper divisors (93571294).

129210146 is a wasteful number, since it uses less digits than its factorization.

129210146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3690.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 129210146 is about 11367.0640888490. The cubic root of 129210146 is about 505.5516580431.

The spelling of 129210146 in words is "one hundred twenty-nine million, two hundred ten thousand, one hundred forty-six".