129669575 has 12 divisors (see below), whose sum is σ = 183760560. Its totient is φ = 88916160.

The previous prime is 129669539. The next prime is 129669577. The reversal of 129669575 is 575966921.

It is a happy number.

It is not a de Polignac number, because 129669575 - 2¹² = 129665479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129669577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370310 + ... + 370659.

It is an arithmetic number, because the mean of its divisors is an integer number (15313380).

Almost surely, 2^129669575 is an apocalyptic number.

129669575 is a deficient number, since it is larger than the sum of its proper divisors (54090985).

129669575 is an equidigital number, since it uses as much as digits as its factorization.

129669575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740986 (or 740981 counting only the distinct ones).

The product of its digits is 1020600, while the sum is 50.

The square root of 129669575 is about 11387.2549369899. The cubic root of 129669575 is about 506.1501413567.

The spelling of 129669575 in words is "one hundred twenty-nine million, six hundred sixty-nine thousand, five hundred seventy-five".