9855129 has 16 divisors (see below), whose sum is σ = 14172480. Its totient is φ = 6071040.

The previous prime is 9855119. The next prime is 9855133. The reversal of 9855129 is 9215589.

It is not a de Polignac number, because 9855129 - 2⁴ = 9855113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9855119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229 + ... + 4445.

It is an arithmetic number, because the mean of its divisors is an integer number (885780).

Almost surely, 2^9855129 is an apocalyptic number.

It is an amenable number.

9855129 is a deficient number, since it is larger than the sum of its proper divisors (4317351).

9855129 is a wasteful number, since it uses less digits than its factorization.

9855129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280.

The product of its digits is 32400, while the sum is 39.

The square root of 9855129 is about 3139.2879765960. The cubic root of 9855129 is about 214.3980204322.

The spelling of 9855129 in words is "nine million, eight hundred fifty-five thousand, one hundred twenty-nine".