129533235 has 16 divisors (see below), whose sum is σ = 223196064. Its totient is φ = 63770112.

The previous prime is 129533197. The next prime is 129533273. The reversal of 129533235 is 532335921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (129533197) and next prime (129533273).

It is not a de Polignac number, because 129533235 - 2⁹ = 129532723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129533196 and 129533205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331942 + ... + 332331.

It is an arithmetic number, because the mean of its divisors is an integer number (13949754).

Almost surely, 2^129533235 is an apocalyptic number.

129533235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129533235 is a deficient number, since it is larger than the sum of its proper divisors (93662829).

129533235 is a wasteful number, since it uses less digits than its factorization.

129533235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664294.

The product of its digits is 24300, while the sum is 33.

The square root of 129533235 is about 11381.2668451276. The cubic root of 129533235 is about 505.9726833561.

The spelling of 129533235 in words is "one hundred twenty-nine million, five hundred thirty-three thousand, two hundred thirty-five".