129055274 has 4 divisors (see below), whose sum is σ = 193582914. Its totient is φ = 64527636.

The previous prime is 129055273. The next prime is 129055337. The reversal of 129055274 is 472550921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 472550921 = 17 ⋅27797113.

It can be written as a sum of positive squares in only one way, i.e., 128482225 + 573049 = 11335^2 + 757^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129055271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32263817 + ... + 32263820.

Almost surely, 2^129055274 is an apocalyptic number.

129055274 is a deficient number, since it is larger than the sum of its proper divisors (64527640).

129055274 is an equidigital number, since it uses as much as digits as its factorization.

129055274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64527639.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 129055274 is about 11360.2497331705. The cubic root of 129055274 is about 505.3495916121.

The spelling of 129055274 in words is "one hundred twenty-nine million, fifty-five thousand, two hundred seventy-four".