129057845 has 16 divisors (see below), whose sum is σ = 177288960. Its totient is φ = 88349184.

The previous prime is 129057811. The next prime is 129057913. The reversal of 129057845 is 548750921.

It is not a de Polignac number, because 129057845 - 2⁸ = 129057589 is a prime.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 20816 + ... + 26294.

It is an arithmetic number, because the mean of its divisors is an integer number (11080560).

Almost surely, 2^129057845 is an apocalyptic number.

It is an amenable number.

129057845 is a deficient number, since it is larger than the sum of its proper divisors (48231115).

129057845 is an equidigital number, since it uses as much as digits as its factorization.

129057845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6164.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 129057845 is about 11360.3628903306. The cubic root of 129057845 is about 505.3529473969.

The spelling of 129057845 in words is "one hundred twenty-nine million, fifty-seven thousand, eight hundred forty-five".