129270426 has 16 divisors (see below), whose sum is σ = 258686784. Its totient is φ = 43065824.

The previous prime is 129270409. The next prime is 129270439. The reversal of 129270426 is 624072921.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7915 + ... + 17921.

It is an arithmetic number, because the mean of its divisors is an integer number (16167924).

Almost surely, 2^129270426 is an apocalyptic number.

129270426 is an abundant number, since it is smaller than the sum of its proper divisors (129416358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129270426 is a wasteful number, since it uses less digits than its factorization.

129270426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12165.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 129270426 is about 11369.7152998657. The cubic root of 129270426 is about 505.6302636249.

The spelling of 129270426 in words is "one hundred twenty-nine million, two hundred seventy thousand, four hundred twenty-six".