129243032 has 16 divisors (see below), whose sum is σ = 243563760. Its totient is φ = 64292704.

The previous prime is 129243031. The next prime is 129243071. The reversal of 129243032 is 230342921.

It is a super-2 number, since 2×129243032² = 33407522641106048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129242992 and 129243010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129243031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39428 + ... + 42579.

It is an arithmetic number, because the mean of its divisors is an integer number (15222735).

Almost surely, 2^129243032 is an apocalyptic number.

It is an amenable number.

129243032 is a deficient number, since it is larger than the sum of its proper divisors (114320728).

129243032 is a wasteful number, since it uses less digits than its factorization.

129243032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82210 (or 82206 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 129243032 is about 11368.5105444821. The cubic root of 129243032 is about 505.5945446689.

Adding to 129243032 its reverse (230342921), we get a palindrome (359585953).

The spelling of 129243032 in words is "one hundred twenty-nine million, two hundred forty-three thousand, thirty-two".