129791450 has 24 divisors (see below), whose sum is σ = 241789212. Its totient is φ = 51835520.

The previous prime is 129791411. The next prime is 129791477. The reversal of 129791450 is 54197921.

It can be written as a sum of positive squares in 6 ways, for example, as 71284249 + 58507201 = 8443^2 + 7649^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38222 + ... + 41478.

Almost surely, 2^129791450 is an apocalyptic number.

129791450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129791450 is a deficient number, since it is larger than the sum of its proper divisors (111997762).

129791450 is a wasteful number, since it uses less digits than its factorization.

129791450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066 (or 4061 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 129791450 is about 11392.6050576679. The cubic root of 129791450 is about 506.3086666757.

The spelling of 129791450 in words is "one hundred twenty-nine million, seven hundred ninety-one thousand, four hundred fifty".