129870274 has 4 divisors (see below), whose sum is σ = 194805414. Its totient is φ = 64935136.

The previous prime is 129870271. The next prime is 129870283. The reversal of 129870274 is 472078921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 96727225 + 33143049 = 9835^2 + 5757^2 .

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 not an unprimeable number, because it can be changed into a prime (129870271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32467567 + ... + 32467570.

Almost surely, 2^129870274 is an apocalyptic number.

129870274 is a deficient number, since it is larger than the sum of its proper divisors (64935140).

129870274 is an equidigital number, since it uses as much as digits as its factorization.

129870274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64935139.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 129870274 is about 11396.0639696344. The cubic root of 129870274 is about 506.4111418335.

The spelling of 129870274 in words is "one hundred twenty-nine million, eight hundred seventy thousand, two hundred seventy-four".