126129165 has 16 divisors (see below), whose sum is σ = 203768448. Its totient is φ = 66614976.

The previous prime is 126129127. The next prime is 126129169. The reversal of 126129165 is 561921621.

It is not a de Polignac number, because 126129165 - 2²⁶ = 59020301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126129169) 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 15 ways as a sum of consecutive naturals, for example, 39274 + ... + 42363.

It is an arithmetic number, because the mean of its divisors is an integer number (12735528).

Almost surely, 2^126129165 is an apocalyptic number.

126129165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126129165 is a deficient number, since it is larger than the sum of its proper divisors (77639283).

126129165 is a wasteful number, since it uses less digits than its factorization.

126129165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81748.

The product of its digits is 6480, while the sum is 33.

The square root of 126129165 is about 11230.7241529654. The cubic root of 126129165 is about 501.5010425664.

The spelling of 126129165 in words is "one hundred twenty-six million, one hundred twenty-nine thousand, one hundred sixty-five".