90129 has 8 divisors (see below), whose sum is σ = 129472. Its totient is φ = 55440.

The previous prime is 90127. The next prime is 90149. The reversal of 90129 is 92109.

90129 = T₁₃₇ + T₁₃₈ + ... + T₁₄₅.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90129 - 2¹ = 90127 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (90121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1117 + ... + 1194.

It is an arithmetic number, because the mean of its divisors is an integer number (16184).

2⁹⁰¹²⁹ is an apocalyptic number.

It is an amenable number.

90129 is a deficient number, since it is larger than the sum of its proper divisors (39343).

90129 is a wasteful number, since it uses less digits than its factorization.

90129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2327.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 90129 is about 300.2149230135. The cubic root of 90129 is about 44.8354483999.

The spelling of 90129 in words is "ninety thousand, one hundred twenty-nine".