133121304 has 24 divisors (see below), whose sum is σ = 360537060. Its totient is φ = 44373744.

The previous prime is 133121299. The next prime is 133121311. The reversal of 133121304 is 403121331.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 924382 + ... + 924525.

Almost surely, 2^133121304 is an apocalyptic number.

It is an amenable number.

133121304 is an abundant number, since it is smaller than the sum of its proper divisors (227415756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133121304 is a wasteful number, since it uses less digits than its factorization.

133121304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848919 (or 1848912 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 133121304 is about 11537.8205914289. The cubic root of 133121304 is about 510.6020111280.

Adding to 133121304 its reverse (403121331), we get a palindrome (536242635).

The spelling of 133121304 in words is "one hundred thirty-three million, one hundred twenty-one thousand, three hundred four".