129516874 has 4 divisors (see below), whose sum is σ = 194275314. Its totient is φ = 64758436.

The previous prime is 129516857. The next prime is 129516911. The reversal of 129516874 is 478615921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 478615921 = 7 ⋅68373703.

It can be written as a sum of positive squares in only one way, i.e., 105945849 + 23571025 = 10293^2 + 4855^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 129516874.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32379217 + ... + 32379220.

Almost surely, 2^129516874 is an apocalyptic number.

129516874 is a deficient number, since it is larger than the sum of its proper divisors (64758440).

129516874 is an equidigital number, since it uses as much as digits as its factorization.

129516874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64758439.

The product of its digits is 120960, while the sum is 43.

The square root of 129516874 is about 11380.5480535869. The cubic root of 129516874 is about 505.9513797691.

The spelling of 129516874 in words is "one hundred twenty-nine million, five hundred sixteen thousand, eight hundred seventy-four".