1304129121 has 16 divisors (see below), whose sum is σ = 1786881600. Its totient is φ = 845425728.

The previous prime is 1304129093. The next prime is 1304129221. The reversal of 1304129121 is 1219214031.

It is not a de Polignac number, because 1304129121 - 2¹⁰ = 1304128097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1304129091 and 1304129100.

It is not an unprimeable number, because it can be changed into a prime (1304129221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343210 + ... + 346988.

It is an arithmetic number, because the mean of its divisors is an integer number (111680100).

Almost surely, 2^1304129121 is an apocalyptic number.

It is an amenable number.

1304129121 is a deficient number, since it is larger than the sum of its proper divisors (482752479).

1304129121 is a wasteful number, since it uses less digits than its factorization.

1304129121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6928.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1304129121 is about 36112.7279639741. The cubic root of 1304129121 is about 1092.5471729147.

The spelling of 1304129121 in words is "one billion, three hundred four million, one hundred twenty-nine thousand, one hundred twenty-one".