33605121 has 8 divisors (see below), whose sum is σ = 48880224. Its totient is φ = 20366720.

The previous prime is 33605087. The next prime is 33605137. The reversal of 33605121 is 12150633.

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

It is not a de Polignac number, because 33605121 - 2⁷ = 33604993 is a prime.

It is a super-2 number, since 2×33605121² = 2258608314849282, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (33601121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509136 + ... + 509201.

It is an arithmetic number, because the mean of its divisors is an integer number (6110028).

Almost surely, 2^33605121 is an apocalyptic number.

It is an amenable number.

33605121 is a deficient number, since it is larger than the sum of its proper divisors (15275103).

33605121 is a wasteful number, since it uses less digits than its factorization.

33605121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018351.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 33605121 is about 5796.9924098622. The cubic root of 33605121 is about 322.7021219596.

Adding to 33605121 its reverse (12150633), we get a palindrome (45755754).

The spelling of 33605121 in words is "thirty-three million, six hundred five thousand, one hundred twenty-one".