129122074 has 8 divisors (see below), whose sum is σ = 194666868. Its totient is φ = 64233120.

The previous prime is 129122053. The next prime is 129122087. The reversal of 129122074 is 470221921.

It can be written as a sum of positive squares in 2 ways, for example, as 128981449 + 140625 = 11357^2 + 375^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×129122074² = 33345019988122952, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163467 + ... + 164254.

Almost surely, 2^129122074 is an apocalyptic number.

129122074 is a deficient number, since it is larger than the sum of its proper divisors (65544794).

129122074 is a wasteful number, since it uses less digits than its factorization.

129122074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327920.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 129122074 is about 11363.1894290292. The cubic root of 129122074 is about 505.4367675148.

Adding to 129122074 its reverse (470221921), we get a palindrome (599343995).

The spelling of 129122074 in words is "one hundred twenty-nine million, one hundred twenty-two thousand, seventy-four".