129345466 has 4 divisors (see below), whose sum is σ = 194018202. Its totient is φ = 64672732.

The previous prime is 129345421. The next prime is 129345479. The reversal of 129345466 is 664543921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 664543921 = 3659 ⋅181619.

It can be written as a sum of positive squares in only one way, i.e., 118919025 + 10426441 = 10905^2 + 3229^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32336365 + ... + 32336368.

Almost surely, 2^129345466 is an apocalyptic number.

129345466 is a deficient number, since it is larger than the sum of its proper divisors (64672736).

129345466 is an equidigital number, since it uses as much as digits as its factorization.

129345466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64672735.

The product of its digits is 155520, while the sum is 40.

The square root of 129345466 is about 11373.0148157821. The cubic root of 129345466 is about 505.7280822232.

The spelling of 129345466 in words is "one hundred twenty-nine million, three hundred forty-five thousand, four hundred sixty-six".