129775510 has 32 divisors (see below), whose sum is σ = 246486240. Its totient is φ = 49059072.

The previous prime is 129775489. The next prime is 129775511. The reversal of 129775510 is 15577921.

It is a self number, because there is not a number n which added to its sum of digits gives 129775510.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129775511) 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 15 ways as a sum of consecutive naturals, for example, 151002 + ... + 151858.

It is an arithmetic number, because the mean of its divisors is an integer number (7702695).

Almost surely, 2^129775510 is an apocalyptic number.

129775510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129775510 is a deficient number, since it is larger than the sum of its proper divisors (116710730).

129775510 is a wasteful number, since it uses less digits than its factorization.

129775510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680.

The product of its (nonzero) digits is 22050, while the sum is 37.

The square root of 129775510 is about 11391.9054595796. The cubic root of 129775510 is about 506.2879388323.

The spelling of 129775510 in words is "one hundred twenty-nine million, seven hundred seventy-five thousand, five hundred ten".