129906452 has 24 divisors (see below), whose sum is σ = 259226856. Its totient is φ = 56429568.

The previous prime is 129906451. The next prime is 129906463. The reversal of 129906452 is 254609921.

It can be written as a sum of positive squares in 4 ways, for example, as 37636 + 129868816 = 194^2 + 11396^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129906451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72593 + ... + 74360.

It is an arithmetic number, because the mean of its divisors is an integer number (10801119).

Almost surely, 2^129906452 is an apocalyptic number.

It is an amenable number.

129906452 is a deficient number, since it is larger than the sum of its proper divisors (129320404).

129906452 is a wasteful number, since it uses less digits than its factorization.

129906452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146987 (or 146985 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 129906452 is about 11397.6511615332. The cubic root of 129906452 is about 506.4581611674.

The spelling of 129906452 in words is "one hundred twenty-nine million, nine hundred six thousand, four hundred fifty-two".