40120129 has 8 divisors (see below), whose sum is σ = 46306368. Its totient is φ = 34047600.

The previous prime is 40120121. The next prime is 40120133. The reversal of 40120129 is 92102104.

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 40120129 - 2³ = 40120121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40120121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27667 + ... + 29080.

It is an arithmetic number, because the mean of its divisors is an integer number (5788296).

Almost surely, 2^40120129 is an apocalyptic number.

It is an amenable number.

40120129 is a deficient number, since it is larger than the sum of its proper divisors (6186239).

40120129 is a wasteful number, since it uses less digits than its factorization.

40120129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56855.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 40120129 is about 6334.0452319193. The cubic root of 40120129 is about 342.3372100093.

The spelling of 40120129 in words is "forty million, one hundred twenty thousand, one hundred twenty-nine".